Do you want to continue marching band in college?
Since you’re interested in FL schools, U of Miami might be a good fit for you. It’s a match stat-wise, has an undergrad marketing program http://bulletin.miami.edu/undergraduate-academic-programs/business/marketing/ , and has a great marching band program as well https://www.bandofthehour.org/ The full-pay COA is over your budget (around 69K) but you may be able to get some merit aid, or need-based aid if you qualify. (Marching band participants receive a stipend as well - $1500-$3500 depending on leadership positions and pep band participation.)
Miami of OH could be worth a look as well.
https://miamioh.edu/fsb/academics/marketing/academics/major/index.html
http://music.miamioh.edu/mumb/
https://miamioh.edu/admission/merit-guarantee/