When i was shipping rodents to people that needed my extras, my average 15x15x12 boxes would hold about 30lbs of rodents and cost about $35 FedEx Ground.

Big companies overcharge on shipping to make up for their so called low prices, yea right.

No need to ship next day air unless its small order since FAA regulates shipments to 5lbs of dry ice per box when shipped next day air. Shipping ground theres no limit on amount.

if you breed your own, 1.2 is plenty. Females will drop 6-18 per litter about every 2-3 months.

1 snake fed once every 7 days will only consume 52 rats a year. You would have all that after 4 big litters from the rats.