25.00 and hour both ground and flight. I explained to my students outright that if they scheduled 3 hours, they were getting billed for three. I didn't work for free. I didn't bill 2.x or 1.x taking into account pre and post-flight, etc. Any cancellations that were not weather or Mx based ,i.e. no shows, got billed half the rate. Setting the standard up front really helped. Most seemed to understand that they got paid when they went to work, even if they went to the bathroom. Since I only did it part-time, if I was at the school, I was damn sure getting paid for it.
A##hole you say? Hardly. During the summer my schedule was always full.