From what I have gathered if you plan on breeding you should have a tank setup and fully cycled before adding the fry (similar to having a QT tank). I have a breeding pair of Yellow Watchmans, so I have been taking in tons of information from people that used to breed. I really don't plan on trying to raise the fry anymore after I learned what I did....though YW fry are smaller than clowns, so they have more specialized food requirements that I just don't plan on spending the $$ to get going either. I would suggest you try out
http://www.marinebreeders.org (not any kind of competators site) as well. They have tons of info on breeding all kinds of marine fish. It might be another resource for you to look at.