I buy in the Ghetto, not purposely, but if the deal is worthwhile I do it. Going in I already know that someone might be late here or there with the rent. Or may not pay at all. But these deals are usually so directed in my favor that I don't have to depend on every monthly payment. Also I don't buy shacks, I buy the block tank looking ugly houses, ones that look like mini forts. I never buy wood or manufactured houses. A physically sound structure is very important to me. I tile out the floors. I don't add any extras like microwaves, ceiling fans, dishwashers, trash disposals, etc. And when I go to the property I walk up like I am not afraid of anything, even if there are suspicious folks out front. I look at them and in my mind I try to relay to them that "I am not a victim, nor prey". I am not sure how successful that tact is but it has worked so far. If you don't want to deal with it at all, just get a property management company. Someone is willing to do the work. I will say that if I see open market prostitution or drug operations then I probably wouldn't do the deal. I will feel bad renting to a family in a area that I know that there is open market activities such as those.
With that being said, I have a friend that rented his townhouse in Baltimore for a law student who turned out to be the worse tenant ever. Apparently she used her knowledge of the law to her advantage to tie up his place for months. Additional she attempted multiple unprofessional and incomplete renovations to the property that costed thousands to repair.