If he’s got a cat buddy, I wonder if an additional rabbit buddy is necessary? Also, while all means well, definitely keep a close eye on their relationship with each other. Rabbits are prey animals, so if your cat snaps and gets a bit mad and freaks out at Beans, it may not end well.
In terms of him being single, that’s not necessarily something you need to amend. Wick is on his own and is pretty content with his life, as well as many people who have only single rabbits. If your vet deems it safe, I would have him neutered though? Unsure what hormonal behaviors he may/may not be showing, but any sexual frustration he may end up experiencing from not being able to mate with anything may cause him to get a bit destructive; however, that doesn’t happen for every un-neutered male.
For a cage, fancy is not necessarily needed. The NIC cages (using grids) are pretty affordable. Especially since Bean’s is a dwarf, so probably ~2lbs max?, you can just purchase a pack of cable ties (very cheap online) to help put together 2-3 sets of grids (1 set is about $20 on Amazon). Some people use small pieces of carpets/rugs to fit as flooring. Other people use coroplast!
Is giving him more than 2-3 hours a possibility? That’s a very small amount of time. If possible, is there a section of your dwelling that you can rabbit proof so he can get stimulated with a larger environment? Corrugated loom (covers wires) is an easy way to rabbit proof some things.
The answers provided in this discussion are for general guideline purposes only. The information is not intended to diagnose or treat your pet. Seek the advice of your veterinarian or a qualified behaviorist.