Mice and rats reptoduce really easily and will have big litters considering you have only 2 snakes, of course you can then supply food to friends of yours or as pets for children, but giving it a try is worth it, even just for the experience.
What I did to start was buy 2 females and 1 male. I put them on separate plastic tubs high enough that they wouldn't escape, in a ventilated place, I bought a big bulk of wooden shavings and I changed them 2 times a week.
I fed the mice fruits, vegetables and different types of cereals.
I could really go on forever, so take a good thought about it at let us know if you really want to, because you can find different methods and tips