Except that in many cases, your clients are going to ask of you the equivalent of "write this tomorrow, in a language you don't know." In fact, I reckon freela

Except that in many cases, your clients are going to ask of you the equivalent of "write this tomorrow, in a language you don't know." In fact, I reckon freelancing is even worse in this regard, as you have no recourse--at least at a full-time job, it is likely you may have another higher-level manager to whom you can plead your case. Telling a client "no, I can't do that" isn't going to work, because they will find someone who will, for less money.