I hate to be the one to burst your bubble but breeding clownfish is usually not profitable for the first couple years you are doing it. It will be easier to make money off the snowflakes because they go for so much. You should be warned that it will take a good chunk of money as an upfront cost to get a breeding operation going. Unless you have seen the pair of snowflakes you intend to buy already paired and laying eggs I would reconsider trying this for profit.
On the flip side, If you start a breeding operation i would love to see a thread about it watching your progress. I really would like to be able to start one myself but the time, money, and space is just not an option right now. Another good book that is not clownfish specific but still has a lot of good information is
The Complete Illustrated Breeder's Guide to Marine Aquarium Fishes
by Matthew L. Wittenrich
Also you should check out this forum
Marine Ornamental Fish & Invert Breeders Association • Index page
You will be able to find several other clown breeding logs and threads.