If you have to think about your spider in the wild, and mommy has had enough all the slings and chases them away, they have 100 times bigger "enclosure" than what you can ever give them and some of them will make it to sexual maturity and live on for years to come.
So the biggest enclosure you put them in will be fine, they will survive.
I go from Deli cup to large coffee jar then to a half arboreal tank

and then a full arboreal tank.
Coffee jar is 7cm squared and 17cm in hieght. (on the left)
The half arboreal tank is 150W X 220L X 220H. (in the middle)
The full arboreal tank is 220W X 220L X 300H. (on the right)
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Coffee jar is 7cm squared and 17cm in hieght. (on the left)
The half arboreal tank is 150W X 220L X 220H. (in the middle)
The full arboreal tank is 220W X 220L X 300H. (on the right)
I would put him into the coffee jar to start off with and then after 2 molts go into a meduim or large container.
I had my first
P.irminia in a full arboreal tank at 5cm stayed in the one enclosre till he was a MM.
I housed 3 X
P .cambridgei at 4cm into plastic containers that are 140W X 240L X 170H and they still fine, eating and molting.
With regards feeding them, Try throw the prey item on or near the spiders webbing, but eventually the prey Item will wonder over to the spiders webbing, exactally what happens in the wild.
Just bear this in mind,
Psalmopoeus species and a couple of other arboreal species tend to go under ground and make hectic webbing so you will hardly see your spider, the larger they grow the more active they become the more they come up and out.
Unless you mess with them and rearrange there home to make them web where you wont them to web. :eyepoke: :starwars: