A few comments:
–Right now you are a sophomore in HS. You have one year of a GPA and no standardized tests. You have no idea yet if you will even be a competitive candidate for Brown when the time comes to apply. It is too early to even worry about it.
– It is a terrible idea for anyone to have one dream school – especially one like Brown with a single digit acceptance rate. The people I have seen most hurt by the college admissions process are students who fixate on one hyper-competitive school and then don’t get in or can’t attend.
–In your other thread you said your parent’s objection was that they don’t feel you are mature enough to go away to college. Again, you are young. Use the next two years to behave in a manner which shows that you should be trusted on your own.
–If finances are an issue (which I suspect is part of it) then like it or not UF may in fact be the best affordable option. UF is an excellent school and has an honors program which you might qualify for if you continue to do well in HS. If you do attend UF, when the time comes (not now) see if your parents would let you take a year abroad or at an approved program with another US school so you can broaden your horizons.
–Please take a moment to recognize that there are tons of people around the US and worldwide who would do almost anything for the chance at a 4 year college education – especially with no debt at graduation. You have expressed zero appreciation for the fact that your parents have been diligently saving for your college education.
–You are looking at things very short-term. If you graduate from UF debt free you should have the ability to become self supporting. At that point you can move where you want and do what you want/can afford for the rest of your life. That is a gift.