I have (4) 1.3 colonies of fancy mice. I feed off the ugly or mean ones then sell the others as pets. The money I make from the pet sales buys frozen to supplement the feeders. I sell one fancy pet mouse and it can buy me 5 frozen mice. Currently I'm breaking even with the cost for feeding.
I also recently started with asf.
I could probably do another two or three colonies before it started to get to time consuming.