I swear by using FB to find renters. You can do a lot of background checking on potential renters by reading their home page and looking who their friends are.
Most of her renters are "Mama's girls" who just need a little nudge out of the nest. They are attracted by her low room rate (which comes with rules) and usually discover they can actually get a job, be on their own and, after 6 to 18 months, move someplace else with a higher price tag a fewer rules. Yeah, I guess you could say that Sis sort of runs a halfway house. Her daughter (my niece) has the master bedroom and enforces the rules.