It's not that bad tbh. I took care of a bunny sometimes when I was dating this qt chicky and I just had to sweep up the cage once a day. If you get a big enough cage you can fit a broom inside and then drop fresh hay back in
You can train cats to do lots of stuff. I don't recommend it cuz it's not safe but some ppl train them to use a human toilet
I feed my friend's rabbit (and other animals) when they go out of town. They keep it's cage on a screened in porch...dude that rabbit always smells. I hate it.