Here's my 2 cents on the subject:
1) Sell ALL the amps, microphones, mic stands, mixer boards, extension cords, etc. That should save each corps more than a couple of dollars right there!
2) Corporate sponsorship: The Coca Cola Cavaliers, The Bell South Blue Devils, Pfizer Regiment, Microsoft Scouts, Cadets of Burger King, etc.
3) Reduce the daily food menu selections to a choice of either (a) cereal or (b) peanut butter. Finals week will include tuna fish casserole though.