First tub setup: about $200... considering all the husbandry supplies (tongs, heat gun, heat lamp, cleaners, etc.).

2 racks along with a herpstat 2: ~$90-100 per snake (racks $300 and $400, H2 - $200 apx, racks house 8 snakes)

Boas, BRB, Carpet in AP cages with a Herpstat 4 to run them... $350-$450 per cage, $350 for the H4, so apx. 450-550 per snake for t-stat and caging. Note that the cages came with heat tape, lighting, etc.

The bigger the rack setup, say a 12 stack of CB70's etc. the less you will spend per tub. Initially, the rack will cost a lot, but if you break it down by tub and consider that one t-stat can do the whole rack, it is less than doing the same t-stat with a smaller rack, etc.

Also note that purchasing one final enclosure and modding it to suit the different life-stages (i.e. dividing for small snakes) will decrease your overall cost. I invested in stand-alone tubs and tanks at different points and wish that I had just gone with a rack from the start. For my boas and other larger snakes, the racks were used as stepping stones until they were large enough for the bigger AP cages. The racks now house BPs, KSBs, and one CA boa male that is still young and not ready for his own AP cage.