So, I'm not all that familiar with mobile home stuff, but the bible for that stuff is "Deals On Wheels" by Lonnie Scruggs.
If I recall, the main way people do these types of deals is not necessarily to rent out the mobile homes but to sell them with owner-financing. You set how much down and how much a month. The returns percentage-wise can be astronomical.
Given that, one way to structure the deal would be to buy the place, owner-finance the trailers for a monthly fee, then charge a fee for lot rent. But, at that point, you'd be running a small trailer park, so you'd have to see if there would be zoning or other issues. Do your homework. On the upside, though, if you sell the trailer rather than rent it, you are not responsible for maintenance.
From what I've heard, mobile homes are closer to cars than to houses in many ways. They depreciate like cars, are purchased like cars (i.e. with the equivalent of a pink slip) and can be repossessed like cars (i.e. no foreclosure process).
I'd check on Bigger Pockets for more info, I'm sure they've done at least a podcast or two on mobile home investing.
HTH
