Hello! I've started researching T's and started learning more about them after getting over my fear about them and now I've developed a fascination for them. However, I just have a few questions on them.

1.) What is the normal/average size to enclosure ratio? I'd probably keep one of the more 'fancy' T's out on display, but, duplicates or other T's that interest me most would be kept in tubs and such, so I just want to know what size of tubs, show cases, etc.
2.) Where do you get enclosures from? I'm not talking about tubs, but actual 'show cases' so to speak. I know that quite a few people get them from Micheal's, but what are they labeled under, and what's the size for a large arboreal species, like an adult female P. Metallica?
3.) How often do you change or bake the substrate? I know that you don't have to clean them much, just spot clean some of the leftovers and watch out for fungi that might grow in damp/humid enclosures, but other than that, how often do you change it?
4.) What's the feeding rule for them? I know that some people say a large cricket/roach once a week for a large T, but I feel that's a bit lacking, or is that just me?
5.) What is the average temp. for a desert (terrestrial), fossorial, arboreal, etc. species? I heard that room temp is fine, as long as you keep the substrate damp for some species.

And that's about it for now. And yes I know, it's probably better to get a NW T first, then move up to arboreals, then to OW, etc. I don't plan on getting any within the next few months, but if my dorm allows it in college, that I probably will.

Thanks!