I rent a room in my house to a friend (not a relative). I charge him less than would this would rent on the marked. Can/should I claim this as a not for profit rental property? What counts as qualified expenses when determining if I am making profit?

If were to put my property on the market to rent I would probably get ~$2500 a month (maybe more). It is a 2 bed/2 bath/2 car garage. I only charge my friend $850/month for his half. I know the mortgage does not count as a qualified expense but things like mortgage interest can. I've come up with ~$700 of things I think count as qualified expenses.

Thanks,

Lisa