The great thing about trailer parks is- you rent the lot. They own the trailer. If the roof leaks, or the toilet need fixing- its their problem. If they bring in a new trailer, and the owners leave- the mortgage company will pay YOU the lot rent. I have a freind in Starke who has a trailer park, and he gets them on lot rent, water, sewer, has a laundrymat and some video game machines and vending machines. He sold his Electical contracting business and started building more parks, pouring slabs and installing infrastructure. Many of his renter are military, and usually stay a few years then move on to wherever they get transfered to.