I wish you all the very best of luck in your new venture!Having run a successful bish breeding bsuiness from home (With Discus), Here are some tips that may help: ** Speak to a few people first, visit forums and shops to find out what sort of fish people are after, and what is in short supply. ** Where possible, avoid breeding fish that are easy, and produce hundreds of babies. You will NEVER make much with these fish - there's just too much competition and will will quickly flood the market.** Certain types of catfish, and cichlids seem to be very popular and offer quite reasonable returns to the breeder who produces quality fish. ** Focus on fish that are harder to breed, and produce small numbers of fry. You won't have as many fish to sell (And therefore to look after), but you'll make many times more on each one you DO sell.**If you do want to stick to the more popular types of fish, then focus one rare color varieties etc ......You need to ask yourself - Why would anyone want to buy from me? Hope the above points get you thinking .......................