Just yesterday, I built a 60 hole shoebox rack using 1/2" XPVC. I bought it from Laird plastics. They cut it to my dimensions for $100 per sheet. So, a 60 shoebox rack for $300. The only other thing you need is screws, heat tape, and tubs.
I'll be posting pictures and instructions on my site soon.
- Larry Petty
SunshineStateExotics.com