i have bred quail for many many years when i was young and we have done that and we lost alot of quail due to it!
we have also bred rabbits, chukar, phesants(golden and ringneck), peacocks, turkeys, lots of different chickens, piegons, doves im sure i left some out.
also if you breed quail on dirt youll have serious problems! wet feed and they are done. plus they require supplements on top of feed.
besides the fact that they are not an actual food for your snake, they take up more room than rats will. they cost more to care for and maintain, take more time than rodents.
if you paying 6$ for a rodent then breed your own! switch to f/t whatever. stop buying from a pet store find a breeder!