Taught sailing at USC and shared my 8 boats with 200 students.
Key was if you broke it you fixed it within 48 hrs or I arranged for repain and the student paid for it.
I expeced the other to do nothing and the students normally met my expectations so I provied a service at 1/3 the commercial rate and was happy.
students were vere very honest and greatful. I promised a little and they took a lot and all was well. Capt Bob