I keep rats instead of mice. If you don't need smaller feeders, you might consider that. Rats smell less and have fewer social problems like fighting and cannabilism.
I don't know what size your sweater boxes are, but you can use this cage space info as a guideline. Many of us consider this a little too crowed for best results.
Water dishes just don't work. They dumped over or pooped in, usually both. Then the bedding is wet and stinks. I have used both water bottles and automated waters. Either one will work. For a small operation water bottles work fine, for a large operation I don't think they would be cost effective because of labor costs.
Many of us use:
feed - rodent chow, dog food, mixed grains ( various recipes)..
treats - bread, cabbage, raisins........(not nessecary)
bedding - pine shavings, carefresh or other newspaper based
products, rabbit pellets, alfalfa hay.....
tubs - sterlite, rubbermaid, cat pans, cement mixing tubs....The important thing is not to have edges that the animals can get started gnawing on.
racks - several sets of pics are on the forum, or if youre only going to keep 4 or 5 tubs, you can just stack them, with 1X2s between them for ventilation
Good luck, you definetly have enough snakes to make it worth you're while.
DeMak
cage space info