Will 4's on my AP science and math tests hurt my chances?

Are you crazy? Why would you want to burden your parents (“family income is <$60k with 6 dependents”) with Parent Plus loans? Because you may run into one of 50 kids you knew from High School, on a campus with 50,000 students? Stop that, just stop it…

Stay in-state, take one of the merit scholarships offered at UCF/USF/UNF/FAMU, etc, the Bright Futures scholarship and earn your degree. Or look at the full scholarships offered at OOS schools like Alabama.