He probably doesn't have legal ground to stand on. I mean, every single place I've ever rented, write in bold that I cannot, without explicit accept from the ow

He probably doesn't have legal ground to stand on. I mean, every single place I've ever rented, write in bold that I cannot, without explicit accept from the owner, rent it to other people. I understand why he was blacklisted, and if his contract is anything like I suspect, it's his own fault. He can buy a place and rent it out instead, but doing it with other peoples property without their concent is asking for trouble.