Ah, but is he full-up on clients wanting to pay full price/out-of-pocket? I would concentrate on the "comfort" value you provide of his continuing to see a client he knows and likes versus the anxiety of having to break in a new client. He can't know if the new person will work out. It's kind of like when a company hires a new employee and has to train them and break them in, etc. I think they'd much prefer if the old employee would just stay. I know how fond I am of change (not!) and I don't really think there are people that relish it. T's probably do better at tolerating it but I doubt many like it, the turnover in clients and having to find new clients, the paperwork and marketing their services and getting use to one another, how reliable the person is, etc.?