Hobbs & Charging
I rent aircraft and won't use the hobbs as I think it encourages people to not take the proper time over checks and in the winter walming the engine.
The probem is that the dishonest can cheat me because I only charge from take off to landing, the balance is that the aircraft usualy get treated better.
The way flying clubs charge is a minefield when it comes to calculating the real cost per hour and I have no other advice but to steer clear of clubs that quote a low price and then hit you with "add ons" as these are usualy used to hide a high price.
I may soon fit the flight GPS loggers that the glider pilots use to my aircraft, this will solve the problem of the dishonest pilots and may even save the honest pilots a little money by reducing my costs, the result would be that the honest guys would not be subsidizing the dishonest guys.