@Nathan H. I am a broker that specializes in Manufactured Housing and something that I've noticed in selling parks where a portion of the home inventory is RTO is that it can be tricky for a buyer and seller to agree on value. For example, the title for a traditional park owned home lies in the hands of the park owner. If a new buyer is taking over the titles on all POHs and RTOs when they buy the park and a resident is close to paying off their home (let's say $1,000 left in payments on a $10,000 home) but defaults, then the new owner owns a POH that they can turn around and sell that home for more than they paid for the scheduled home payment collections. But, as a buyer, you're not going to want to pay more than $1,000 for the title to that RTO home because the resident will likely complete their payments and become the rightful owner of the home.
Just some theory that I thought I'd share. I hope that it was relevant and made sense.
Regarding an action plan, I'm thinking that it'd be a good idea to sell the land and not include the RTO homes in that sale. You continue to collect home payments ONLY while the new park owner is collecting lot rent. In the off chance that the resident defaults, then the new park owner can then purchase the home FROM YOU. Just my two cents.
How many lots is the park?