Sure, but owning the entire property is a superior option because it means they are not paying anyone for the privilege of living there (minus taxes to the government).
Yeah, but the original idea was a social welfare plan. The target isn't those who will take initiative to find and buy a tiny parcel for their trailer (tiny parcels are a very hard thing to find), but the people stuck in a rut of trailer living. Its not about the opportunity already being there, it needs to be presented as a realistic option.