QB, I'm glad Cassie is doing well. I guess I thought all 3 had the same mom.
RR, we moved pretty quickly to get the one barn ready for the horses. Now we're able to move a bit slower and be more thoughtful about the changes. Originally I wanted to build a feed/tack room at the far end of that space, but now I believe I will consider that entire space to be the feed/tack room. I just want to fill it with hay, now.
Does he react to catnip? If he does, a simple ball or mouse with catnip inside could keep him occupied for a while. Does he like to pounce on and chase things? A toy on a pole with sturdy string would be good, and you can play along with him. There are so many toys to choose, and you may have to experiment to find what he likes best. Our 3 cats all like something different---Burger likes wind-up toys, Mysti likes a catnip mouse, and Baby likes a small cloth ball that she carries around, and brings it to me to throw for her.