One of the most commonest questions any professional receives is with regards to fees.
Sometimes it can be a basic, say, hourly rate. However when it comes to sports then there can be many variables. For example...am I working with an individual, a couple or group? Are they recreational or competitive? So don't concern yourself with regards to fees, what is important is whether you accept the fact that success does begin in the mind.
Once you have conquered the barrier of limiting beliefs and limited expectations, then you will see the benefits. In effect one could say there are two fees, one is a set rate, agreed by both parties...or a performance rate, again set by both parties.