I checked the site and they do look like great enclosures, but to get near the interior space I'm looking for would cost me over $500. I doubt I could sell the wood closet for more than $200 on Craigslist.
I'll mentally store them for the future, because I probably will buy another reptile eventually, but right now I'm interested in trying to use flex-seal with PVC lining on top of it. At any rate, I can't bring the closet into my house anytime soon (I'm trying to sell other furniture to make room), so it isn't like I need to make the decision today.
Those do look pretty good. I'll consider it while I wait for my old furniture to sell.