You need to pay very serious attention to Frank’s last paragraph, because I believe you’re probably about to lose your shirt. Sometimes free is still too expensive, and I can give at least 3 examples going back to the 80’s.
If there was demand, the park wouldn’t be vacant. In my experience if a property, MHP or APTs Or whatever are vacant, there is usually a very good reason, no demand. The only exceptions I’ve ever seen is when the management is utterly incompetent.
I’d do the homework in case there is something there that’s positive, but more than likely that deal is a total loser.