the viv stack i'm building is made out of Ikea stuff - the Leeds one was selling off flat-packed Pax wardrobes with battered boxes for £10 - cheap wood and lots of fittings!!
cornsnakes, ratsnakes, bullsnakes, boas and day geckos
Top, Base & Back - 3 of 3' x 2' Left and Right Gables - 2 of 2' x (2' - twice the width of the wood) Top & Bottom Plinths - 2 of (6" - width of the wood) x (3' - twice the width of the wood) 2 of 3' runners (will need to be trimmed to fit) 2 of 1' x 18" Glass doors
The Gables (ends) will sit inside the Top and Base. The bottom plinth will sit between the gables and on top of the base. The top plinth obviously the same but against the top.
I seriously suggest you check my maths though and look at other designs before buying anything
Sure there are some plans on here that you could just scale up.