I have kept the following arboreal / semi arboreal Ts:
2 x P cambridgei
2 x P irminia
2 x Avicularia species
1 x P ornata
1 x P fasciata
2 x H maculata
Some of them I had in glass coffee bottles (Nescafe gold largest bottles) P ornata, P cambridgei.
I recently bought smallish arboreal enclosures. 10 x 10 x 18cm. I am keeping the following in them: P fasciata (from 3cm), A versicolour (form 5cm), H maculata (~1cm) and P irminia.
Important to keep an eye on moisture requirements as well as making sure they catch their prey.
The biggest problem with large enclosures is the ability of the sling to catch it's prey (if it can't find it, it can't eat it) and possibly falling to death (only real problem with none arboreals in too high enclosures). the irmina and fasciata (semi-arboreal) has almost completely webbed the bottom 2/3 of the enclosure. The A versi has covered the top of the enclosure (true arboreal style) with webbing.
When it comes to feeding, almost always, the T will retreat to its hiding spot when disturbed. So it shouldn't escape after settling in unless you prod it form its home.
So, on that note, one thing to add. After rehousing, leave the T for a day or two so that it can build a retreat. I had my A seemanni escape because soon after rehousing I was trying to force it into its pre-created hiding place. It decided to bolt out the enclosure all together. 2 days later, after creating a huge burrow, it just runs and hides when I open the lid.