My guess is.. the challenge will be keeping the bacteria medium hydrated & oxgenated; be it live rock, live sand or canister filter media. This is to sustain majority of the bacteria population during the 'rent & transfer'.
hydration cos bacteria once dried out will die off.
oxgenation cos bacteria need to breathe too, & in our tanks they get oxygen via water flow. So if you have a viable solution for hydration, the next thing is to have the water continue circulating, which should be achievable with battery-operated power heads.
however, upon reaching the new tank, I'm not sure how hardy bacteria is when it comes to acclimitizing to new water conditions. Would be interesting to hear more inputs from the rest of the community!