Most of the guys I know go to sportsman clubs and gun shops and setup classes. They charge for example $100 per student and do anywhere from 6-15 student classes. The club or shop gives them the space and gets a cut (say $10/student). It also benefits the shop or club by bringing people in. It's best to offer both basic (no shooting, very short) classes and advanced classes.
I don't need No stinking signature.