That is an interesting idea. It is one I have considered. I would like to raise a nest or two of perculas or black ocellaris, but they do not sell as well as ocellaris, and I am still trying to break even financially. Perculas take 9 months to a year to get to selling size, whereas ocellaris start being sellable at 4 months. I don't have enough tanks to make that work. Black ones are great to look at, but there is not the market for them that regular orange ocellaris commands. I have asked about collecting the larvae of friends' fish's nests who have nice specimens pairing in their display tanks, and I may do that in the future.
Bangais are wonderful for breeding, but they need more room and produce fewer fish, and would not be a good move financially right now.
Once I get established, I want to breed all these types and more. Right now, I have to keep my day job, raise my family, and do what I can with the ocellaris farm. I may retire from my day job, and focus on the fish breeding in a few years...Then I can do what I want.
My most immediate need, however, is to get another good looking pair of breeding ocellaris in case something happens to the single pair I already own.