I moved with my two rabbits (who have both since passed) from Belarus. We knew we were moving permanently so taking the rabbits was a no brainer. There is a lot of research and consultation that goes into the process. I would stress that it is understandable for long term moves but if someone plans to be abroad for a few months or a short period, it would be best to leave the rabbits at home with somebody. In short term moves, I just think it is really hard to expect to make a rabbit take an extremely long flight only to make it do it again in a few months. However, 1 to 2 years between incoming/outgoing flights is doable.
Firstly, as I am sure you know, you must research what are the entry requirements for a rabbit into your destination country. Following that, you must find an airline that allows rabbits in the cabin. Not all airlines allow it and can be very strict with their regulations. Finding a flight can be the most difficult process (well, besides the actual flight) so make sure you give it a lot of time. Call the airline as well to discuss their policies and make sure 110% (even get them in writing, or letter form) that the rabbits can fly in the cabin. You’ll encounter extra charges for a rabbit up in the cabin but it usually isn’t astronomical. Talk with your veterinarian (obviously a rabbit savvy one!) about completing health certificates as well as if any sedatives can be given on the day of the flight to ease the rabbits’ stress. My two rabbits were very laid back but I made sure I was prepared. Find out the carrier size limitations as well as how you can make their airline carrier “rabbit friendly”. In your carry on bag, you’ll need rabbit supplies if they are up in the cabin with you. (Just food/pellets, obviously, no greens.)
My rabbits handled it alright. After the move, they lived on to old age. It is stressful on rabbits, no doubt. That’s why I stress for long term moves, it is permissible. Short term moves, I wouldn’t suggest it. Sometimes we have to think what is best for the rabbit’s wellbeing and not what makes “us” feel good. I “think” you could get away with 1 or 2 years.
Hope that helps.