My only experience teaching for a flight club involved a club with an Archer, and Cherokee 180. The poor archer's landing gear was abused so much, you could land it sideways like a B-52! I was employed by the FBO on the field, so I basically billed out my services through there. I didn't want to lose the primary income of that job by jeopardizing it to that flight club whom I was only instructing one guy for his IFR ticket. Now if you are just a straight GDI(Gosh Darned Independant), then you are good to go, don't undercharge for your services!