Hi,
First, I’m so sorry to hear things have been so difficult for you recently. You sound in good spirits, and I am wishing you the best recovery healing vibes I can send.
Two thoughts came to mind right away: An x-pen and clicker training. First, if you can be allowed a designated space the size of an x-pen, or two joined together althought that may be too many feet for your parents, then your bunny would have a much larger space to live in and be able to run around somewhat within that space. You could add some tunnels or platforms, so the bunny can run under but also jump up and down so he can get a workout. My new one is currently 4′ x 4′. Also, a cage can be secured to an x-pen attached to the opening to make the cage area bigger but not as large a combo as two x-pens would be.
The other thing is to clicker train your bunny to come to you. The respond very well to it, learn commands fast, and could even be trained to stop chewing on bad things if you watch and catch him at it. You can go online to the website, but I’d recommend the small book on the subject in BB’s store, a clicker is small and cheap, plus small treats or even pellets are all you need for training. If you don’t allow your bunny into forbidden zones like your bedroom (or the bed area) he will learn about what’s off limits. But with intensive clicker training he will come to you on command and you won’t need to chase or pick up. A command to go back into his house will be one of the easiest and most important to start with.