Rats are pretty good about taking care of each others litters. 3 nursing females can take care of more than 30 pups so just leave them together. I'm in my litters almost every day ... Most rats are really tolerant of being disturbed.
6000 lbs of food is 120 bags ... 40 bags per pallet ... Pretty easy to store 3 pallets. Its brought up on a semi ... off loaded with a forklift.
Bryan