Retic Questions?

[repticfreak7]

Hey guys,
Within the month I am recieving a 3 foot normal retic. Right now she is going to go in a temporary custom made cage. I won't have the money to build/buy a better one for at least a month but the guy said he needs to get rid of the snake a.s.a.p. Since I don't have the money, she will be going it a Cabinet converted into a cage. It is 3' tall, 3' wide, and 18" deep. It is the best I can do right now. My main question was, it has a shelf in the middle and I was wondering if I could cut a hole in it and stick a branch through it so the snake could climb up and the basking spot would be up there. The problem is I have no way of heating the bottom shelf and I was looking for ideas. Any advice on caring for retics is also appreciated.