The flaw in this argument is that Beingness isn’t defined by whether or not someone is on my (or anyone else’s) property.

Besides, land ownership is a cluster of rights (land surface, subterranean, air, etc.), none of which are owning humans. Did you know you can sell your land, but keep some rights, such as mineral rights? Crazy! And typically a functioning society has public lands like roads and forests and parks - and because of the way the market works, shops want you on their property to buy stuff.

Is your big complaint that non-landowners (unhoused) have no place to go?