I never find difficult to manage clients. I am at their disposal. But of course you may have some extra clarifications before a client purchases an account, but If he speaks for 30 minutes and then says I am not satisfied then I will become frustrated. So my point is A client is difficult to handle(to me) before he buys an account, after he gets one from me then He doesn't finds any difficulty with my hosting, and I never find any difficulty with him(I have only 24 clients, and you dont find difficult to answer all the 24).