You’re wonderful to try so hard to make him happy when you’re having such a tough time. I also live in a small place, and YES use that vertical space! They love climbing. But definitely make sure it’s enclosed enough that he can’t dive. (Think of a tall ferret cage as a guide?) What’s worked for...
I appreciate that you’re doing your best to turn this guy’s life around! He’s in very poor health, you realize. I would get him to an exotics vet quickly. You’re aware they get large, and deficiencies occur very quickly. Definitely check with a vet and even a local zoo in how they’ve ensured the...