Wood is cheaper than PVC, firstly because it is HEAVY as HECK. I have a melamine for my dumeril's, and I am never getting a wooden enclosure ever again. If you are going to put money, time, and effort into building such a complex enclosure anyway, I would 100% go for PVC.
Unless you are a huge strong man or have a huge strong husband, it's literally going to be impossible to move an enclosure of that size anywhere.
That's just my 2 cents. I'll never get wood again. LOL