You can buy proven males and females, but they are gonna run you a lot of dough if they are grade A++ flowerhorns. But each batch of say 100 2" babies will net you in $40 per fish if you sell to the right people. So that's 4k in one batch. Not bad eh? So you probably end up paying around $500 for a super nice male with a great kok and around the same for a super nice female with a little kok and super nice colors and flower line. Always use the partial divider so the male doesn't kill her and you'll be safe. So that's about 4k off of these fish per month once you really get going. Not bad huh? XD But like always, you have to have money before you can make it. like one 125 gallon for the breeding tank with around 5 55 gallons for the grow outs. You can always isolate the nicest male and female specimen from the grow outs, grow them to around 5-6" and you've got yourself a possible $100-$300 fish. Depending on how good they are though.