it sounds like a cool idea, but i'd need more info. like, a lot more.

materials, what kind of tubs would it use and what sizes, how does it hold heat/humidity, does it move well, does it use tub lids?, what kind of heating, cost, etc.

Shipping is a lot because the racks weigh a lot. I'd say my fully assembled 6tier rack from AP (economy line) weighs more than 50 pounds without any snakes in it. they yse 3/4'' stuff and it is almost indestructible.