We don't really have to guess about the budget, their 990 is on Charity Navigator.
In 2017 their total revenue was $2,114,011
$210k came from donations/grants
$1.2mil came from the corps camp fees, membership fees, and show fees
$231k came from Bingo
$163k came from fundraising events
$333k came from some kind of inventory sale
In terms of expenses
$84k went towards officers/directors/etc compensation (Almost all of this is the $82k salary of David Glasgow)
$177k went towards other salaries/wages with another $55k towards benefits/payroll taxes
$705k went towards travel
$419k was considered to be "other fees for services" from non-employees, given the low salary number this probably includes show design and instructors?
$194k was bucketed under depreciation
Their total "program" expenses were $1.7mil with another $300k in administrative/management expenses