Housing for a Green Tree python?

Hi all, I currently have two ball pythons in an AP T8. I wanted to dabble in the world of arboreals, and I was curious on specifics of caging options. I'd really prefer to get another T8 to stack on top, and split it in half. I wanted to know if I kept a GTP in one half of the enclosure, and put plenty of different levels of branches, would he be happy? The enclosure is 4x2x1, which is not very tall, but would it be okay if there were plenty of places to choose from? I figure they do fine in breeding tubs, but I wanted to double check

if you are getting a neo (baby) then a tub would be ok until you can get the propper cage for it.
when that small, it's best to keep them in a smaller cage, think something in the 12x12x12 size, with the right heat and humidity,. if you are going to use an exo terra cage, you need to cover the top in order to keep humidity in check, a good heat source with a controler is needed, avoid the heat lamps, they dry up the cage .
once it gets big enough to be moved (1 year old), then it can be in a 24x24x24 cage with a good temperature gradiant.. lots of vines, perches and leaf cover so it feels secure..

that 4x2x1 cage would be too big for a baby and too short for an adult.but you could use 3 deviders and get 4 GTP's :-D you'll end up getting more anyways hehehehe and just use that cage as your neo cage for now !!! just a taught ;-)