If you want to work small scale rather do discus, and you might break even with cost of feeding fry and heating tanks.
Another fish I think is going to become a big hit are the very long finned bristle nose plecos. It is a dominant gene so you only need to get one.
Small tanks are inefficient as you have very slow growth, and lack the nutrition they get from bugs outside. Rather think small ponds or inflatable pools with some insulation underneath. If you want to do fancies, you need 3 tanks per strain, minimum, 4 or 5 would be better as it allows you to keep fry of similar size together and sexes apart.
Cape Town, South Africa.
Hi. I'm back.