A gym owner contacted me to see if I’d be interested in training a woman in my target market. (The gym owner and have not signed a formal working agreement.) I accepted the client (training her in her home) and, due to a business-related issue between the gym owner and myself, I’d now like to formally take on this client as my own. What would be the best way to have this person become my sole client?
I’m unclear about the business related issue
Does this mean you had a dispute with the owner?
If you don’t have a contract with the gym/owner of the gym and he asked you to train the client then I think it’s ok to do just that
However, I always look at the big picture and don’t burn bridges, one never knows who knows whom in this industry