breed for profit

as the title says I have a 2.5-gallon tank. one of those cheap bowfront 2.5 betta tanks, and I was wondering what I can culture because I am hoping to breed angel fish by feeding them live foods.

Looking to breed guppies to try breeding for profit. I have a 29 gal somewhat heavily planted tank lots of stem plants, substrate fully covered, salvinia covers almost entire surface. I was wondering if it would be possible to breed 24k gold guppies from a single pair or trio. Would the later...

I posted a thread a couple of days ago titles; 'Shipping live aquatics in the UK. How can I do this? Can I do this?' and in that thread I said I wanted to breed for fun on a small scale. However, after looking at figures I have been wondering if I could implement this 'breed for profit' business...