I was wondering if the marching band was part of the appeal. I think you have a shot at JMU, especially since you’re not from NoVA… but another great option you might look at is WVU, which has both an undergrad business school and a terrific marching band program. Admissions stats aren’t vastly different from JMU, but median GPA is a little lower and acceptance rate is a little higher; and your SAT is solidly in the middle 50% at WVU whereas it’s below the 25th percentile at JMU. So it could be a good one to have in the mix.
For a smaller school with interesting business-related majors, not too far away, you might look at McDaniel in Maryland. A little reachy but not out of the question. No marching band though.
For a Maryland option with business and marching band, you might consider Towson.
Good luck!