Very sad, but it's alive, therefor it has a chance.
A hide will do no good. I would not even consider a "normal" arboreal enclosure, it is obvious this spider will find it extremely difficult to climb. Take a standard terrestrial enclosure and place a perch at a very shallow angle, say 20 to 30 degrees and rest it on the side of the enclosure. This will aid the spider should it want to "crawl" upwards.
Take a medium sized cricked and remove all but two front legs. The reason for this IMO is that if you remove all the legs from the cricket, it is unable to move in any way. If it has two legs left, it is likely to move those legs when gripped in tweezers, making it easier for the spider to detect the cricket. Crab the cricket in tweezers and present it to the pedipalps. This will take extreme patients, but keep at it if at first it does not take the prey.
Good luck again, this is a test for both you and this poor spider...
Most people are like clouds. The sun comes out when they f*ck off...