First of all, welcome to the board. If do a search on this board for loans etc, I'm sure you will get lots of great info since it has been discussed here before.
In order to get you started, you can borrow $18,500 per year from federal student aid, you can borrow up to $30,000 /year from Bank One and there are also several other banks who offer student financing. I think there is a cap of around $155,000 but even supporting a family, you should not need to borrow that much (unless attending U. of Penn). Good financial planning is essential. Pay off as many bills, credit cards etc as you can before school, trim the fat off your budget and then borrow whatever it takes.
Personally, I paid off all credit cards, paid off one of my cars, sold the other and bought a cheap new car for school and managed to put a little $$ in savings prior to school. My wife will likely drop to part-time and work weekends after this semester so we won't have to use daycare. I will borrow whatever I need to insure that lack of money does not add to the stress of school. Live trim and you should do fine. Good luck.