Nothing, but I find the framing of this project dishonest.

Edit: Well actually, there are a few things wrong with trailer parks. For one, the value of a house is the value of the land, and not the value of the house or trailer. Trailers are built on small plots, thus as the trailer gets older, the owner might not be building equity. Say if the land was worth 50k and the trailer 50k, after 20 years the value of the trailer might have gone to zero, but the value of the land might not rise over 100k meaning that the homeowner loses equity or doesn’t build as much equity as they might have, with a 150k home on a decent sized plot. Especially since the value of a house will not go to zero over 20 years, and if limited renovation will actually increase.

Honest title: Business owner sells business, uses proceeds to become a property developer and build a trailer park.