I happen to work with an open- yes, open class drum corps where I am the food/volunteer coordinator. I have made it my full time job by branching out into catering and also feeding all our other ensembles, as well. I can tell you that our staff (including instructional) get paid, including myself. This, however (unfortunately), is NOT the norm, and no one gets rich doing drum corps alome. But, due to much creativity & drive, I'm able to "live the dream" year-round.