@carl It may be dependent on state, and I’m not sure if it’s a legitimate practice to begin with. But it does happen regularly and likely changes based on state. I see it very often in the markets that I’m in.
For example, on my quest to buy mobile homes I always find the owner prevents the sale if I want to move it from their park (regardless if it’s to my park or not). Even if the tenant owns their home free and clear.
Conversely I also always see on other operator’s leases or rules that the mobile home cannot be moved at all or for X amount of years. At the very least they have it so they can vet the buyer, or sometimes they even have first right to purchase the home. So it’s always done in favor of the MHP owner.
It would be nice if somebody that knows if this is a legitimate practice could chime in and confirm. One last thing to keep in mind is that mobile homes are considered “personal property” so it falls in a different category than “real property” (like a stick built) would.