I was looking into building a rack for hatchlings out of 1/2 plastic material. The stock cost 86 dollars for a 4 x 8 sheet. I have talk to the guys at the plastic place and I am sure I can get them to cut the material for a small price. I just have not sat down to see how many sheets I would need to build it, but I would think around 3 sheet would work. 3 x 86 =276.06 with tax, plus solvent 6 bucks = 282.06.......20 bucks for cutting charge.....302.06. now for some tubs and heat and you are done. Now you have to solvent weld it together with out messing it up. I guess that is why they cost so much pre-made.