I've mentioned before Dad likes the title "Slum Lord". He says it represents real power over real people. Just as people who have skills cant get hired if the people who own the skilled people housing wont rent to them (even when their credit is perfect and they have never rented to them before) life can be pretty hard for pensioners, fixed and low income people if the people who provide housing at that cost level (which Dad says around here goes into the 700's and in other places is a little higher) have rented to them once before and found them intollerable to their neighbors in a flagrant and deliberate way.
Dad doesn't like to put his name on businesses and finds its good for his interest to use different names in different areas so that people don't get the idea that a major conglomerate has glommed onto all the housing of a certain type in certain types of communities.
Gramps says that housing near universities often comes up for sale very cheap and they have specialized in this though they own other types, so people who think they have only screwed up here will find that when they transfer to another school they still cant get housing.
Why do we have to give second chances when there is enough business from first chances, and it possible to raise the rent more on new tenants than on existing ones as there are sometimes rules about that. This is much more true in high transience communities though even in low transience communities cook once and perish.