My boyfriend and I finally finished our rack system. Took a week of planning and building to get them done.
Here is the link. It's not step by step, but it's a lil look-see for ya.
http://acepythons.com/racks.html
Here's an approximate break down of prices:
Wood: $172
Supplies (screws, sandpaper, etc): $50
Thermostat: $170
Heat tape: $30
TOTAL: $422 approximately.