With a small number of snakes, I'd probaly try really hard to get them on F/T so you can just buy frozen and store them. With several people to split an order you could get cheap rats from Rodentpro and really save a lot of money, without having to clean up after rats or mice or ASF rats.
With maybe a pair or trio of rats you might be able to feed the snakes, but you will have a issue with rats getting too big, unless you euthanize and freeze them. But if you can use frozen then you might as well buy them already frozen. Of course, you may end up breeding rodents as a sideline, as I think a few folks have done that. Started out breeding for their own snakes, then sold a few extras to friends... then a few more to the local pet store.. next thing.. it's a business! LOL>
Good luck!
Wolfy