i currently don't have the money for this idea but for some go-getter, check this out:
since some people can't afford, or don't want to pay, or live in apartments so they can't sing too loud and such:
get a building with soundproof rooms. each room has the whole rock band setup.
you could charge by the hour or day, etc as far as how much someone would pay to play.
this would also make it easy for people in the area to join up and have fun, etc.