It's much easier to chinchilla-proof the bathroom. You can still play with him in your room as long as you can stop him from getting into danger. My desk area is not chinchilla safe at all but I can grab him before he reaches anything he shouldn't because he is tame enough that he won't jump off the desk when I'm after him.
Yes i now considered the bathroom to be the playroom cause my room has rug and if they poop its gonna be hard to pick up after a while. The vacuum i have picks up dust and things half the size of chinchilla poop so it would be even tough. I have a TV and Computer also associated with a bunch of cords under my TV.
Also i did finally get to convince my grandma to have my chinchillas inside. I showed her what illnesses they get. I also showed her that the poop and urine doesn't smell and that there clean animals since they take dust baths twice a week. So she said "ok but keep your room clean and keep feeding the dogs and school bring me 100 points in all 7 classes."
Super excited when i get them!!
Another thing is i know i wont have all the money at once to buy the cage, the chinchillas, the food, treats, food bowls, water bottles, and the bedding and so on. Im considering on getting the cages first to get out of the way