I think what Sarah was saying is, there isn’t much of a point in having them together because hamsters don’t really need as much outside of their cage time unlike rabbits who need hours.
I don’t know if your rabbit would harm the hamster, I just know my experience in having mixed-species-free-roam time. I have a trio of male guinea pigs, who often are around our bonded pair of bunnies.
So I have a female/male pair, and the male couldn’t care less about the guinea pigs. Our female, Pumpkin, however.. She absolutely does not enjoy their presences. When they are getting run around time, and the bunnies are in the area, Pumpkin lunges and grunts at them all the time if they get close to her.
She used to not mind them, but that switch flipped suddenly and one of the guinea pigs got quite the surprise. Nobody was injured, but they were scared for a while. They dont understand that type of communication, because guinea pigs have a completely different set of actions that mean different things than bunnies do. Hamsters are the same.
My point is, even if your bunny doesn’t mind the hamster now, that doesn’t mean that can’t change. And if the bunny is free roam, and the hamster is in a pen, why worry if they’re already separated?
The stuck on a elevator with someone who speaks a completely different language is quite accurate in my opinion. 