I don't know what they will charge but I take my hat off to anyone who succeeds in launching a business. It takes a lot of work and dedication. There are many obstacles to overcome, not the least of is satisfying your clientele which involves a lot of hand holding at the beginning and good service throughout.
An example is my friend who is a trainer at my gym. He has been there a long time and his passion has never wavered. He used to manage the place, but now is an independent trainer and rents his office there. He is part of the fabric of the gym and his qualities include a love of all sports (he was watching the Tour de France on his laptop in between customers), great work ethic, friendly demeanor, extremely pleasant to talk to, focus on his customer during their time (will not engage in small talk with others which steals time from customer - instead gently deflects or quickly responds to those that chat with him). He also employs part of the Hippocratic oath - "first do no harm" in sizing up a trainee and concentrating on good form. In short he is a gem of a human being.
I have seen many trainers come and go, but my bud just chugs along 6 days a week (1/2 day Saturday). He fills his days with an average of 8 training sessions at $50 each. We are taxed heavily here, but most who collect cash declare only enough to avoid an audit. When we go to lunch and he pulls out his money to pay, there is always an abundance. He deserves every penny because he has lined all his ducks in a row. That's what it takes to succeed.
Normally customer cost is kept relatively low until one makes a name for himself, then it can go up to what the market supports.