To house Tree Wetas, you need a strong tank. Provide a soil base and if possible a tree trunk or rotting branch which has a hole for them to enter. You can substitute with a paper tube, place rotting wood around it.
Phyllium philippinicum. Note that getting the nymphs to eat is one of the most common problems, so I would advice never to buy nymphs which have just hatched. The photo shows an immature pair (female left, male right).