It is extremely difficult to get an equity loan against a rental property because of this. Banks will not loan money because these properties are very risky due to the inability to evict non paying tenants.
Im doing a heloc on one now. I screen furiously. Went through about 50 applications before I settled on one. Several applicants flubbed the preliminary phone screening questions by complaining about their current landlord. Thats akin to complaining about your current employer when on a job interview.
Caught one using a friend to pose as a previous landlord reference.