I know you're so excited for it!
So I went out today and bought just the basics for my setup. I don't have my UTH or thermostat or hygrometer or thermometers yet because those come next paycheck. Then I get my snake in August!
here is my setup:

-rubbermaid shoebox (holes go in tonight)
-2 electrical access box things with 1" diameter openings (yay home depot!)
-1 terra cotta plant pot bottom. This looks a little large, so I'll have to see how the little guy likes it and maybe buy a smaller one if he isn't a soaker.

These electrical access boxes are very neat - made of PVC with a screw on back for easy cleaning. I can also use that feature to make a humid hide when I need to. They come in a lot of sizes too so I can keep him in similar hides for awhile!

So what do you think? Should anything be changed? Are there any risks for snakes associated with PVC?