>Well, that's whey you need to be sure to be in a slum area. Perferable to rent to people who do a lot of drugs and break the law on a regular basis - that way after the one month you just say the words "calling the cops" and everyone retreats! That or they start shooting. Best bet is to have a hired thug or two for the 'evictions'.
So what is better then, to have tenants with strong and/or multiple convictions?