Scaling a Rental Portfolio: Keep Some, Sell Some, Scale

Scaling a rental portfolio on cash flow alone almost never works. Boris Sanchez, who has owned more than 2,500 units across multifamily, self-storage, retail and office over 16 years, puts it plainly: consistent rent checks require very low leverage or a paid-off property, so investors who chase cash flow first tend to stall at a handful of doors.

His alternative is a three-way split — keep some properties for depreciation, sell some to create liquidity, and use the proceeds to scale into assets of five units and up, where value is set by income rather than by neighborhood comps.

Below is that framework turned into a decision process: where the BRRRR loop breaks, what changes at the five-unit line, how many doors it takes before full-time staff stops being a drag on your expense sheet, and how to compare exit strategies on a single property before you commit.

From the Real Estate Pros Show

This article draws on an interview with Boris Sanchez of Sanmore Investments on the Real Estate Pros Show, hosted by Scott Bursey.

Why Cash Flow Alone Won’t Scale a Portfolio

The first thing to accept is that cash flow is the hardest output in real estate to manufacture, not the easiest. Sanchez has watched this across 16 years and more than 200 students he has mentored: “It is very hard to actually reach rent checks without doing absolutely nothing. Cash flow is very, very hard to get, and you’re going to have to have very low leverage, if not have the property completely paid off.”

That single constraint explains most stalled portfolios. If meaningful cash flow only shows up at low leverage, then the investor who insists on positive monthly income from day one is forced into large down payments, small deals, or both. Each acquisition eats more equity than it returns, and the portfolio grows arithmetically at best.

It gets worse because of how the asset itself behaves. Real estate is the most popular asset class there is — ask someone where they’d invest and they say real estate before stocks — but it is also the slowest-moving and the least liquid. Capital you commit to a rental is capital you cannot easily get back. Sanchez calls illiquidity real estate’s biggest structural problem.

So the investor with four or five doors is squeezed from both sides: the monthly income is thin, and the equity that would fund the next deal is locked up inside properties that take months to sell or refinance.

The way out is not a better rent roll on the same assets. It is a deliberate plan for which properties produce tax benefit, which produce capital, and which are big enough to be worth building a team around. That is the rest of this article.

Where the BRRRR Method Quietly Breaks Down

Ask a room of investors to name a strategy and most will say BRRRR — buy, renovate, rent, refinance, repeat. Sanchez’s objection is structural: “In none of that does it say scale.”

The loop assumes two things simultaneously. First, that you bought far enough below value that a refinance at standard loan-to-value returns most or all of your capital. Second, that the refinance happens fast enough that the capital recycles before your next opportunity passes. Sanchez’s assessment of that combination is blunt — he doesn’t think it’s realistic.

Look at what the refinance actually gives back. After purchase, rehab, holding costs and closing costs, a cash-out at conventional LTV frequently leaves five figures of your money stranded in the deal. You own an asset with modest cash flow and a reduced equity position. Do that four times and you haven’t compounded capital; you’ve distributed it across four properties and thinned it out each round.

The seasoning period compounds the problem. The months between stabilization and a completed cash-out are months your capital is doing nothing, which is exactly the liquidity trap described above.

None of this means BRRRR is a bad tactic. It is a reasonable way to acquire a single asset with less capital than a straight purchase. The error is treating a transaction-level tactic as a portfolio-level growth plan. Repeating a process that returns 70 cents on the dollar does not produce scale, no matter how many times you run it.

Scale requires either a step-change in asset size or a source of capital other than the last refinance. Sanchez’s framework supplies both.

You should keep some for depreciation to save on taxes. You should sell some in order to scale and have enough liquidity. And you should scale in order to have economies of scale — more units under one property, so you have more concentrated management and maintenance and lower expenses. That is true scaling.

— Boris Sanchez, Sanmore Investments

Keep Some, Sell Some, Scale: The Three-Way Split

Sanchez’s method has three parts, and the point is that they run at the same time rather than in sequence.

• Keep some — hold a portion of the portfolio for depreciation and the tax treatment that comes with ownership. These are the assets you are not trying to monetize this cycle.
• Sell some — dispose of properties specifically to generate liquidity. Not because they’re bad assets, but because trapped equity cannot be redeployed.
• Scale — put that liquidity into larger assets where more units sit under one property, so management and maintenance consolidate and expenses drop.

In his words: “You should keep some for depreciation to save on taxes. You should sell some in order to scale and have enough liquidity. And you should scale in order to have economies of scale.”

The second piece of the framework is a measurement change. Most investors score a portfolio on monthly cash flow and nothing else. Sanchez counts proceeds from debt as part of what a portfolio returns — when asked what his real estate operation generated, he answered by including cash-outs alongside sales and revenue, arriving at roughly $3 million. His reasoning: “Real estate is not just cash flow, it’s not just profit. The strategies also include debt — taking on debt is sometimes the smartest thing you can do.”

That reframing matters practically. If a cash-out refinance counts as a return, you will pull equity on a schedule rather than waiting for a crisis. If only rent counts, you will hold equity idle for years and call it conservative.

The tax side is specific to your entity structure, basis and holding period. Depreciation treatment, recapture on sale, and whether an exchange makes sense are all questions for a CPA before you list anything.

The 5-Unit Line: When a Property Becomes a Business

Five units is where the valuation method changes, and that single change is the strongest argument for scaling a rental portfolio upward rather than sideways.

Below five units, a residential property is appraised against comparable sales. You can renovate the kitchen, raise rents, cut vacancy — and the appraisal still keys off what the similar house down the street sold for. Your operating performance is almost incidental to the valuation.

At five units and above, the asset is valued as a business on the income it produces. Sanchez frames it this way: “Real estate is a business, and only when you get up to five plus is it going to be seen and valued officially as a business. So you want to get to those levels as soon as possible, so that the more money that property is making, the more it’s worth.”

This is the difference between organic appreciation and forced appreciation. Organic appreciation is the market doing something to you. Forced appreciation is you doing something to the asset — and Sanchez’s position is that it only genuinely becomes available at five units and up.

The practical consequence: every dollar of additional net operating income converts into multiple dollars of value at the prevailing cap rate. Raising rents, filling a vacant unit, adding a billable amenity, or cutting an operating expense all translate into valuation, and that valuation is what you refinance or sell against. The owner controls the lever.

It also changes which work is worth doing. On a single-family rental, obsessing over a $40 monthly expense line is noise. On a 20-unit building, $40 a door per month is a meaningful swing in value.

Running Lean: Unit Count, Staffing, and Economies of Scale

Sanchez’s definition of true scaling is narrower than most people’s: more units concentrated under one property, so that management and maintenance consolidate and expenses come down. Twenty scattered single-family rentals across a metro is not scale. A twenty-unit building is.

The reason is staffing math. Scattered doors mean drive time, multiple vendor relationships, and separate turnover processes — all of which are expensive per unit and none of which get cheaper as you add doors. Concentrate those units on one site and the same manager and the same maintenance tech cover all of them.

“We figured out how to stay very lean, which is a must when you’re owner-operating,” Sanchez says. “We figured out a sweet spot where we have enough units to have full-time staff and not let it be a drag on the expense sheet.”

That sweet spot is the real threshold. There is a unit count below which a full-time manager or maintenance tech is pure overhead — their salary consumes the margin they’re meant to protect. Above it, in-house staff is cheaper per door than third-party management plus trade calls, and you get faster turns and better control.

Sanchez currently runs about 150 units, primarily multifamily, with in-house management and maintenance, having scaled down from a track record of 2,500-plus units as his attention moved to other ventures. He is explicit that the team is what makes it work: managers and maintenance staff are his eyes, ears and feet on the ground, even on properties he owns free and clear.

Before you hire, find your own threshold. Compare the fully loaded cost of a full-time hire against what you currently pay in management fees and outside trade labor across the properties that person would cover.

Comparing Exit Strategies on the Same Property Before You Buy

One property supports multiple exits, and the right one is a function of acquisition price and rehab scope — not of whichever strategy you happen to prefer.

Sanchez lists the realistic options on a typical residential deal:

• Flip
• BRRRR
• Long-term buy and hold
• Rent by room / co-living
• Short-term rental
• Owner finance
• Wholesale — you don’t even have to close on it

The discipline is to price all of them against the same acquisition number before you sign. That means pulling three distinct comp sets, not one: sales comparables for the flip and the refinance appraisal, rent-by-room comparables for co-living, and short-term rental comparables for the nightly play. Long-term rent comps give you the hold scenario. Each set produces a different value and a different timeline on the identical house.

Then compare them on the terms that matter to your business right now: how much capital is tied up, how long until it comes back, and what the total profit is. Sanchez’s framing is that the obvious rule — the cheaper you buy, the more you make — isn’t the whole answer. The real question is which strategy gets you there faster, easier, and with the most money.

This is precisely where the keep-some/sell-some/scale split gets executed deal by deal. If your portfolio currently needs liquidity to fund a larger acquisition, a flip or a wholesale on a property you’d otherwise hold is the correct answer, even if holding would look better on a ten-year spreadsheet. If you need depreciation this year, the hold wins. The strategy serves the portfolio position, not the other way around.

Run the comparison before the contract, not after the rehab budget blows up.

Frequently asked questions

Is BRRRR still a viable strategy, or does it stop working at a certain portfolio size?

BRRRR remains a reasonable way to acquire an individual property with less capital than a straight purchase. What it is not is a growth plan. Sanchez’s criticism is that nothing in the loop addresses scale — it assumes you buy low enough and refinance fast enough to roll directly into the next deal, which he considers unrealistic.

In practice, most cash-out refinances return part of your capital, not all of it, so each repetition thins your available cash rather than compounding it. Use it as a tactic on specific deals; don’t expect it to carry a portfolio past a handful of doors.

Why does buying 5+ units change how a property is valued?

At five units and above, the property is valued as a business based on the income it produces rather than on comparable sales of nearby houses. That means improvements to net operating income translate directly into value.

Sanchez’s point is that forced appreciation — as opposed to waiting for the market to move — really only becomes available at that threshold. The more the property earns, the more it is worth, and that is a lever the owner controls through rents, occupancy and expense management.

How many units do you need before hiring full-time management and maintenance makes financial sense?

There is no universal number, but there is a clear test. Compare the fully loaded cost of a full-time manager or maintenance tech against what you currently spend on third-party management fees and outside trade labor across the same properties. When in-house costs less per door and gives you faster turns, you’ve crossed the line.

Sanchez describes finding a “sweet spot” where unit count justified full-time staff without that payroll dragging down the expense sheet. He currently operates around 150 units with management and maintenance in-house.

Should I count cash-out refinance proceeds as part of my returns?

Sanchez does. When asked what his real estate operation generated, he explicitly included cash-outs alongside sales and revenue, noting that real estate returns are not just cash flow and profit — taking on debt is sometimes the smartest move available.

Counting proceeds this way changes behavior: you start pulling equity on a schedule and redeploying it, instead of leaving it idle for years. Tax treatment of refinance proceeds versus sale proceeds differs significantly, so run the specific numbers with your CPA before you act on it.

How do I decide whether to flip, hold, or wholesale a property I already have under contract?

Price every available exit against your actual acquisition number and rehab scope before you commit. Sanchez’s list includes flip, BRRRR, long-term hold, rent-by-room, short-term rental, owner finance and wholesale — and the right answer is determined by what you paid and what the rehab costs, not by preference.

Pull separate comp sets for each: sales comps, long-term rent comps, rent-by-room comps and short-term rental comps. Then compare capital required, time to recover it, and total profit. Factor in what your portfolio needs right now — liquidity for a larger acquisition will often argue for the exit that returns cash fastest.

The bottom line

Start by sorting the doors you already own into the three buckets — which ones you are holding for depreciation, which ones have trapped equity worth converting to cash, and which market you would deploy that cash into at five units or more. That sort takes an afternoon and a conversation with your CPA, and it will tell you more about your next twelve months than another analysis of monthly cash flow ever will.