I know what it involves ... I've been doing band for 10? years.
It's just that most drumline dudes are, to put it nicely, complete assholes. hahahaha! I hope you're an exception to the rule.
Business aspect of running a band? Like popular band or mid-high school or at the university level? I can't see there being an overly in depth part of managing a band that would require an MBA, heh. Just a matter of financing the trips, props, and new equipment, nothing too much. Really, you just have to rock at fund raising and begging for money from the school.