tanks

what kind of tank should i use 4 my ball pythons a glass tank or a plastic bin nd what keeps better humidity.

Well it's up to you, but I would recommend a plastic tub. Glass tanks are prettier and you can keep a ball python happy in them, but the plastic tubs definitely hold humidity better and are much cheaper and easier to transport :)

Depends on a bunch of factors.
Snake age ?
How many do you have, do you want more?
Do you want a natural viv setup?
What kind of $$ do you have to work with?

I've spent more on fully setting up a couple 40's then I might have on a rack, and regret it.

i used a tank for my first bp and never again will i make that mistake. yes it is much more visually appealing however it is harder in my opinion to regulate the temps and humidity even with the foil set up on top. my new bp is in a tub and i could not be happier with that decision.