You are right that your new applicant is nine pounds of bad news. This is simple. Tell your current tenants that their friend does not qualify to rent from you or from anyone else for that matter. Most emphatically get the point across that this person should never be considered a guest in your rental and he is never to spend a single night there. Here is what is shaping up. The three who are paying rent will be moving out. The unemployed deadbeat on disability is the one you will be left with. Then he will move in the remainder of his deadbeat family, his girlfriend and her kids to boot.