Wow, I wasn't getting notifications that there were more responses on this thread! Thanks, all.
We don't know how long he lived in the barn.
We've added a Sittin' Pretty combination perch/gym and he really likes that. It's basically a big perch on wheels with an overhead attachment for a boing or whatever. And it's pretty impossible to climb down it, although he's tried a couple of times.
Relations with my husband are improving!
My latest project with him is that I got a video camera to record what he's doing when we'e gone (and then hopefully find some solutions for the anxiety he displays.) I'm working on ethograms but analyzing that video will take a while
That will be another post!