It all depends on what you have time and patience for. Personally, I considered breeding mice or asf for my 6 bps, and 4 colubrids, but it is just not worth it for me. I'd rather buy a bag of frozen ones a couple times a year.
I know a large breeder who lives near me who only breeds mice to feed his hatchlings. The rest of the food is kept in a huge deep freeze packed with dead rodents.