when a family member or friend offers for you to stay in an extra room of their house for some rent money the home owner really thinks they are doing you a huge favor even though your paying rent, amirite?
They always act like they are helping me when i'm the one helping them with rent.
chances are in this case you are paying a fraction what renting an actual house would cost so yes it IS a FAVOR
same thing when my parents would ask me to do the chores.. I would tell them that to be a homeowner your have certain responsibilities and that I would be cheating them the satisfaction of taking care of their own responsibilities. plus if wasn't there they would have to do it them self anyway.