My first thought is why are you enabling your relatives? They have chosen a certain money management path, that's their choice, but they also have to reckon with the consequences.
My second thought is that's nice of you to help out your relatives.
Third thought: There's a million banks and mortgage brokers, just ask around your friends and neighbors. Random people on the internet aren't going to know the smaller, local ones in your area.
Last thought: is this house your coworker is selling one that your relatives might like to buy?