I don't know how important football is to you, or if you think you're good enough to get a scholarship.
In all honesty if your not going to get a scholarship and since you're already tight on cash, you could quit and check around your neighborhood, or craigslist for a part time after school job, since money seems to be your highest priority right now.
I mean you say your not sure if you'll have a house to live in, so keep in mind that sometimes you have to make sacrifices for the good of your family.