Enclosure shopping newb

[wingbeats]

Hello all!

I am in the research stage for buying my first ball python (which will be my first reptile) and I want to make sure I get things right.

I read that PVC is easier to keep clean and humid than glass, which sounds awesome to me! I live in Idaho, which can get quite dry in the summer. So, I am shopping for some snake tanks.
I also read that PVC from say, Wal Mart works just fine, but really I'd like something that displays the snake at least a little. Though, ease-of-cleaning is a big thing for me so I may end up going the Sterlite route anyways, but I figured I'd pick out some possibilities. Cost is not a huge deal, as I am willing to pay for a snake's comfort, but I do like to be cost-effective

Some good-looking ones I've found so far:

This site has a nice starter kit it seems, which includes stuff like substrate, thermometers, and such. That would be nice, to get everything in one go, if it is all good stuff. Kinda pricey though. http://www.lllreptile.com/catalog/45...-cage-packages

There is also this one that makes really nice-looking ones, though also slightly pricey: http://www.showcasecages.com/cage_details.htm

These ones look good, too, and seem more reasonably-priced. I am leaning towards this, unless the starter kit above is more cost-effective. http://www.coldbloodedenclosures.com...hk=1&Itemid=14

But I'm not really sure what size to get for adult ball python? (I want to do the buy adult-sized-enclosure, fill it with lots of hides thing). People say 30 gallons, but the websites advertise in dimensions like W x H x D. Trying to figure this one out so I know about how much I'm going to be spending and how big a space I need! lol. I suppose I can always message the companies themselves....but really, what dimensions are ideal for adult ball pythons?

And are any of the PVC cage options above not so good? Any other recommended PVC snake cages out there aside from the ones I listed?

Sorry for my newbie-ness. Been doing lots of reading and I want to treat my first snake right Thanks for the help!