In my opinion, it would be better for the buns to have one home. This is because rabbits are stationary as a species. In the wild, they invest lots of time and energy in building their intricate home warrens. This is the reason why rabbits often are so highly territorial. The cost of surrendering their home is higher than the cost of defending it.
It might sound harsh, but two bonded rabbits are not so dependent on their human caregivers for emotional supöort. The humans will of course be the providers food, shelter and a clean, predator-free environment – but the rabbits will look to each other for social interaction, comfort and love.
This said, I move my own rabbit between my apartment and my summer cabin during summer, and this seems to be beneficial for him. He has his own area with his own blankets, tunnels and hidey house, in the cabin, so he always feels right at home as soon as we get there.
I hope you will get more answers from other members, especially members who have been in similar situations.