My family and I move on average every 5 years or so. Some time ago, I invested in a couple of 94 qt
Igloo coolers, and installed a 12 volt rule marine livewell pumps for circulation/aeration. All are powered by a 12 volt deep cycle marine battery. My "moving aquariums" cost about $120 each, and were perfect for the transportation of fish and corals in situ. I fill them about 50% with tank water, and the lids keep most of the water in. I also run a sponge filter in my tanks about a week prior to the move, and attach them to the rule pumps to keep the biological process going during the move. The live rocks were transported in old Rubbermaid containers covered in wet towels or newspapers. When not in use, they reside in my attic. The only downside is their size - you need a van, small truck or large SUV to transport. Unfortunately, we had a major problem on our last move (unrelated to the system I just described) and by the time it was resolved, we had lost most of our fish and corals.