Ah, but my old landlord did exactly this, with the back yard of his home and the lot behind it, which once upon a time held his first home. Until the city tore it down for neglect, at which point it became a vacant lot - that he still owned. Largely with the assistance of his unofficial husband, who’d moved into the backyard, partly due to them no longer getting along so well, and partly due to the house becoming overrun with their hoarder tendencies.
Said unofficial husband was dealing drugs out of the backyard, and, as time passed, the backyard, followed by the vacant lot behind - for some unknown reason referred to as “the sand lot” became home to numerous homeless junkies. It became a rodent infested, trash filled, needle strewn nightmare, abhorred by the neighborhood.
The landlord, bless his heart, was, once upon a time, a sweet, naive, hippy, and very talented artisan. Until “someone” introduced him to meth, and it all went downhill from there. He remained a kind soul - and unable to say no to anyone, even when he could no longer stand the situation himself, and knew he was close to losing his remaining house.
Well, actually, he’d started trying to by the end, with our help; we were happy to play the role of “the bad guys” so he didn’t have to. But it was too late, someone gave him a hotshot (meth and heroin) and that was the end of all that.
(Who were/are we? My partner and I rented the other half of his house in March 2020. It was rundown, but cheap, and we were still getting back on our feet after my partner spent several months in the hospital with bacterial pneumonia and we ended up quasi-homeless. We knew the landlord and his unofficial husband from many many years earlier, long before all the nonsense began, and were in a hurry to find a new place so we did not do our due diligence. Didn’t take long to figure out the hell we’d landed in, but thanks to that little pandemic that started around the same time, it became impossible to move.)
So, yes, people have done that with their house.