Park-owned homes in a mobile home park are supposed to be the thing you underwrite around, not the thing you buy for. Matthias Gruenwald of WCG Investments buys them on purpose, because parks stuffed with POHs draw fewer bidders and price accordingly — and because converting those homes to tenant-owned on rent-to-own contracts collapses the expense ratio without touching gross income.
On his first syndication, a 100-unit portfolio in Spartanburg, South Carolina with 59 park-owned homes, the prior owner was running a 78% expense ratio. After selling 34 homes to residents in year one, that ratio came in at 39%.
Below is the conversion mechanics, what it did to the P&L, the infrastructure conditions Gruenwald still walks away from at any price, and how his team runs 1,400 lots with about 20 people.
Key takeaways
- All-tenant-owned parks are the most competitive product in the space, so POH-heavy parks trade cheaper — the discount is compensation for maintenance work you can systematically eliminate.
- Don’t evict paying rental tenants. Wait for organic turnover, then sell the home on a lease-with-option at the same monthly payment, 5- to 10-year term depending on home age, with the resident taking over repairs.
- On a 100-unit Spartanburg portfolio with 59 POHs, selling 34 homes in year one moved the expense ratio from 78% to 39% while income stayed roughly flat — the NOI lift funded a refinance that returned investor capital.
- Lagoons are an automatic pass on regulatory exposure; wastewater treatment plants are a long-term liability. Septic is fine, and master-metered water you can submeter and bill back is an upside item, not a red flag.
- When buying a mom-and-pop park under market, step lot rents roughly $50 in year one and $60 in year two on a three- to five-year plan. That reputation is what gets you first look at off-market portfolios.
From the Real Estate Pros Show
This article draws on an interview with Matthias Gruenwald of WCG Investments on the Real Estate Pros Show, hosted by Freddie Steen.
Why POH-Heavy Parks Trade Cheaper Than All-Tenant-Owned Parks
All-tenant-owned parks are what Gruenwald calls the holy grail, and that’s exactly the problem. Residents own their homes, take care of them, pay lot rent almost without fail, and the park runs quiet. Every buyer wants that profile, so pricing is tight and the value-add is thin.
Parks with a heavy park-owned home count carry the opposite reputation: a revolving door of turnovers, each one costing money. Sellers price for that reputation, and most buyers price it in twice. That gap is the opportunity.
The gross rent on a POH looks better than lot rent, which is why the math confuses people. In the Carolinas, lot rent typically runs $450 to $600 in strong markets. Florida might be $700 to $800. Some markets clear $1,000. A park-owned home rental might bring $1,100 to $1,200 — double the lot rent.
That premium is largely illusory. Under the prior owner of Gruenwald’s Spartanburg portfolio, every move-out meant $2,000 to $3,000 or more back into the home before the next tenant. Do that on 59 homes with real turnover and the extra $600 a month per unit never reaches the bottom line. You are running a small rental portfolio inside a land lease business, at rental-portfolio expense levels.
The other structural point: a resident who owns their home is not moving into an apartment. That is why POH conversion is not just an expense play — it changes the tenant base into one that has a reason to stay and pay.
The Rent-to-Own Conversion Playbook
The sequence matters more than the paperwork. Gruenwald does not clear out rentals to force conversions.
- Leave paying tenants alone. They have active leases, they pay, the unit works. Nothing to fix.
- Wait for organic turnover. Every natural move-out is a conversion opportunity, and that is the only trigger used.
- Offer the home at the same monthly payment. The pitch is simple: keep paying what you pay now, on a lease with an option, and after the term the home is yours.
- Set the term by home age and value. Five years on newer, better homes; up to ten on older, lower-value stock.
- Shift repairs to the buyer. Rent does not increase during the option period, but repair and maintenance become the resident’s responsibility.
Distressed homes get handled differently. Some sell outright for around $5,000 cash. Others get effectively given away — the buyer takes the home and gets two or three months of free lot rent so they have time to make it habitable before moving in. Contractors and handymen are natural buyers here; a cheap shell is worth real money to someone with the skills.
Gruenwald’s framing: “you kind of play bank in a sense, and you have total flexibility.” WCG also brings new homes in from the factory and sells those to residents, which turns a vacant lot into a tenant-owned lot in one move.
Treat all of this as a description of a business practice, not legal advice. Lease-option and rent-to-own structures on manufactured homes are governed by state law and, depending on structure, consumer finance rules. Have your attorney paper it for your state before you offer terms.
The income stays flat, but the expenses get completely reduced by a significant amount. We went from almost 78% expense ratio down to 39% — we basically cut it in half in year one.
— Matthias Gruenwald, WCG Investments
What the Conversion Did to the P&L
The first syndication WCG did was 100 units across four parks in Spartanburg, South Carolina — 59 park-owned, 41 tenant-owned. The prior owner ran it at a 78% expense ratio, driven almost entirely by the turnover cycle on those 59 homes.
In year one, WCG sold 34 of the 59 homes to residents. The expense ratio came down to 39%.
The mechanism is worth stating plainly, because it is the whole argument for buying POH-heavy parks. Income stays roughly flat — the resident keeps making the same payment, it just becomes a home payment instead of rent. Expenses fall off a cliff, because the resident now handles repairs and there is no turn cost when someone stays put. Flat income minus dramatically lower expenses equals a large NOI increase.
In commercial real estate, value follows NOI. A step change in NOI in year one creates a step change in appraised value, which creates refinance capacity. On one deal, WCG refinanced and returned all investor capital in about 18 months while investors stayed in the deal and kept collecting cash flow — the IRR on that one came out north of 50% because capital came back early and a bonus distribution went out with it.
That is the pattern to underwrite for: buy the discount the market applies to POHs, convert, refinance out, keep the asset.
Infrastructure Red Flags That Still Kill the Deal
Gruenwald’s walk-away list is short and it is all infrastructure. Price does not move it.
- Lagoons — automatic pass. A sewage lagoon is exactly what it sounds like, and it comes with regulatory exposure Gruenwald has no interest in carrying. He acknowledges operators who specialize in lagoon parks are doing well precisely because so few buyers will touch them. His position: “you have to choose your own hard. The hard thing we like to choose is buying park-owned homes, but not dealing with lagoons.”
- Wastewater treatment plants — effectively a pass. One of the 30 parks WCG owns has one. It was a headache, it’s now fixed, and he describes it as a potential ticking time bomb regardless.
- Septic — fine. No issue buying septic parks.
- Private well water — buyable alone, disqualifying in combination. Well water on its own is acceptable. Well plus lagoon together is a definite no. That combination is usually why the park is cheap in the first place.
The flip side is the utility item that makes a deal more attractive: master-metered water that can be submetered per unit. WCG installs Metron- or Guardian-type meters that report into Rent Manager, which knows the rate per 1,000 gallons and posts the charge to the resident’s ledger automatically. Water billback recovered on an existing master-metered park is meaningful NOI you do not have to raise rent to get.
Running Converted Parks Lean: AI Screening and a VA Back Office
WCG runs 1,400 lots across 30 communities with about 20 people. The structure is a filter, not a call center.
Residents call one AI-answered phone line, live 24/7, in effectively any language — Gruenwald tested it in German mid-conversation and it kept up. It carries the leasing knowledge base, so it handles “what’s my balance,” “can I pay next Friday,” and the pet approval process without a human. Whatever it can’t resolve gets escalated on a dashboard.
Behind the dashboard sit specialized VAs: one owns collections, one leasing, one maintenance. They are the escalation layer and the human follow-up. Above them, an asset manager watches KPIs full time and calls the shot on anything the back office can’t close; only genuinely severe events reach the owners.
The collections cadence is fixed:
- 6th: friendly AI reminder call that rent is behind.
- 8th: follow-up email.
- 10th: firmer call warning the resident goes on the eviction list on the 11th.
When someone commits on that call — “I’ll pay Friday” — it lands on a collections report and the human VA follows up to paper the payment plan. Gruenwald’s phrasing for the split: the AI is the shotgun, the humans are the sniper rifle. Every AI interaction, including transcripts, writes back to the resident’s profile in the property management system.
Owners get a KPI pulse twice a day — 9 a.m. and end of day — on collections, delinquencies, and open issues. The system was designed to hold at 5,000 units, not 1,400, which is why the overhead stays low enough to compete on acquisition pricing.
Two Transition Risks Buyers Underestimate
The seller stops working the park before closing. WCG closed the Spartanburg portfolio in late July 2024. The seller had stopped responding to maintenance requests since roughly April, and had told the on-site manager to turn her phone off. Thirty-four maintenance requests came in during week one. Residents, who believed the sale had closed in April, went to a local news outlet and described the new owner as a slumlord.
The fix was two-part. First, correct the record: WCG called the reporter, showed the settlement statement date proving they had owned the property for one business day, and got a follow-up article published. Second, triage — health and safety items first, everything smaller after. The backlog was cleared in two to three months. The underwriting lesson is to ask directly when the seller last funded maintenance, and to budget cash and staff time for a deferred-maintenance surge in month one.
The rent ramp. Mom-and-pop parks are usually under market because the owner never wanted to deal with increases. If market lot rent is $500 and the park is at $250, going straight to market maximizes NOI on paper and crushes a resident base living paycheck to paycheck. WCG steps rents roughly $50 in year one and $60 in year two, reaching market over a three- to five-year plan, and pairs each increase with visible investment — paved roads, security, infrastructure. On one park they built a new bridge because the old one flooded and trapped residents.
That approach also produces deal flow. Sellers who spent 20 years with the same tenants care where they land, and they bring parks to buyers they trust.
Frequently asked questions
Should I avoid mobile home parks with park-owned homes?
No — but only if you have a conversion plan and the operational capacity to execute it. All-tenant-owned parks draw the most bidders and price tightest, while POH-heavy parks price for their turnover reputation. That discount is the return, and it only materializes if you can move homes out of your balance sheet and into residents’ hands.
If you have no process for selling homes, no back office to service the contracts, and no local buyer pool for distressed units, the conventional advice to avoid POHs still applies to you.
How do you convert a park-owned home to a tenant-owned home?
Wait for the unit to turn over naturally, then sell it to the incoming or existing resident on a lease with an option to purchase at the same monthly payment they were already paying, with a five- to ten-year term depending on the home’s age and value. The resident assumes repair and maintenance responsibility, and the payment doesn’t rise during the option period.
Badly distressed homes can be sold for cash as low as around $5,000, or handed over with two to three months of free lot rent so the buyer can repair the home before moving in. Structure and disclosure requirements vary by state, so have counsel draft the documents.
What happens to income when you sell park-owned homes to tenants?
Gross income stays roughly flat, because the resident keeps making the same monthly payment — it converts from rent to a home purchase payment plus lot rent. What changes is the expense side, which drops sharply once you’re no longer funding $2,000 to $3,000 turns on each vacancy.
Flat income against materially lower expenses means NOI rises, and since value in commercial real estate tracks NOI, appraised value rises with it. That’s what creates refinance capacity to return investor capital while keeping the asset.
Which mobile home park infrastructure problems should make you walk away?
Sewage lagoons are the clearest automatic pass because of the regulatory exposure attached to them, and a private wastewater treatment plant should be treated as a long-term liability even when it’s currently functioning. Septic systems are generally fine. Private well water is workable on its own, but well water combined with a lagoon is a hard no.
Note the inverse: master-metered water that can be submetered per unit and billed back through your property management software is an upside item, not a defect.
How fast should you raise lot rents on a park bought below market?
WCG uses roughly $50 in year one and $60 in year two, working to market over a three- to five-year plan rather than jumping straight there. On a park sitting at $250 against a $500 market, moving immediately to market maximizes paper NOI but risks pushing out residents who live paycheck to paycheck, which turns into vacancy, home abandonment, and reputational damage.
The slower ramp also pays commercially. Long-time mom-and-pop owners who care about their residents actively steer off-market deals to buyers with that reputation.
The bottom line
If you’re underwriting a park-owned-home-heavy park right now, do two things before you talk price: confirm the sewer and water situation, because a lagoon or a treatment plant ends the conversation regardless of the discount, and build your year-one conversion schedule off actual historical turnover so you know how many homes realistically leave the balance sheet and what that does to your expense ratio.
