What it sounds like you will basically want to do is rent the equipment with directions to put it together. You could also provide the service where you deliver and set it up and take it down at an extra fee. Perhaps another service where someone operates the equipment by the hour.
Charging by the song is not the best way, it is hard to know how much your customer will have to spend, and they don't like that. By the hour or by the day is the best way to do it.
answered Nov 12 '12 at 21:26