Love the idea but since I have a 7g nano wouldn’t that be enough?Take it with you along with a heavy duty tote, you can use a tote as a tank, a larger or taller tote and you can fill it halfway to prevent jumpers and just because the tote will bow a bit so not filling to the top is safer.
i would probably take some of the rock, whatever has your fav or $$ corals.
Then just add flow and a makeshift tank whenever you stay. They don't have to have light for awhile.