Svejk, you presume too much. I have never had a bad experience letting to poor people. If someone pays the rent, that's fine. Even if I ran a hostel for the poorest, I would expect someone or some body to be paying. That's natural ; if I put the capital in, I expect some return, otherwise I would leave it in the bank or buy shares or some other investment, which won't help anyone who wants somewhere to live.
But what still puzzles me is what black tenants do, or don't do, which white tenants don't do or do? What is the practical difference ?