For the stage of life that I am in with 3 kids under 10, I love being able to go home at the end of the day to spend time with my family and not have to worry about those long band director days for after school rehearsals, football games, contests and the like. Do I miss band? Sometimes, but I like the time at home more.
I think that what will be expected of you, greatly depends on the district and grade level that you end up at. Some of them want a huge full blown productions multiple times a year, and some just want a place for the kids to be able to go to give the classroom teachers their conference period. It can run the whole spectrum.
I hope that this helps!