Well, I would normally suggest that you get your priorities straight and with so much on your plate (GF, school, full time job) that you consider getting rid of the animals. However as an animal lover myself, I know how hard it would be to do that. Get one of those phony service dog certificates for the pit and then they cannot refuse to rent to you.
Yeah, I know it's sleazy. They have the deck stacked against you. Even it up.
I have seen campgrounds charge extra for pit bulls and more than one dog. Really, if you can find a nice home for the pit bull, your life will greatly simplify.