I have an indoor rabbit hutch. It’s made from plywood, but I sealed it with a nontoxic sealant and then covered the floor with non-slip linoleum tiles. Any floor that is just wood will get ruined REALLY fast. Even if your bun is perfect in the litter box, even spilling water, etc will ruin the cage.
My sides are wood, but they haven’t chewed it at all.
For my walls, I used just “cage wire” that comes in a roll from Lowes.
One recommendation I have is to put it on castors! Wood gets heavy fast. I love being able to roll it around to vacuum behind, etc.
If you have any exposed wood, it’s important that it’s natural and untreated wood (which is much more expensive)
My cage is 28″ wide, 30″ tall, and 6′ long. Including the wood, tile, wheels, sealant, wire, etc. it was 185. but I also had to make use of my boyfriend since I can’t use power tools.
I like that I’ll be able to use this for much longer than by buns will last (so sad to think about) but it was a LOT of work and a pain in the BUTT. It would have been so much easier to just get an Xpen. But, I’m proud of it, it’s secure against kitty and puppy paws and it’ll last a long time.