I am drawing up plans right now for the rack, I will post a final plan before i start so you guys can point out any mistakes or things you think i should change. I am thinking that i will only make the shelves of the rack PVC and then the sides and the back will be painted plywood. That way I can make it for cheaper. What size of heat tape and how much do you guys think i need? and whats your favorite cheapest thermostat that would work well for this? Thanks!