Sure I make a profit, but I'm not about to quit my day job. I figure to match what I make as a tradesman I would need to have about 5 times what I currently have running. This also means 5 times the sales. You can look in my profile to see what I have running.
Since a current fishroom upgrade, I'm in the process of trying to run to maximum capacity, this means somewhere in the neighborhood of 1500 to 2000 small angels in various stages of growing out & hatching. My broker buddy says he can move them, and has storage space, so we will see.
A couple years back a breeder in the next state retired, selling 8000 to 10000 angels monthly. He worked a part time job for insurance, out of pocket for heath care was a budget killer. 300 forty gallon tanks on a centralized system, huge setup, some of my gear came from him.