When I moved I did the following and it all worked.
1. Start with plenty of 5 gallon buckets.
2. Siphon water into buckets.
3. Add corals and rocks to buckets keeping coral from touching each other and separating species (Don't put hard and soft corals in the same bucket.
4. Siphon more water into buckets.
5. Add live rock to buckets.
6. Once almost all the water is out, catch fish and put them in plastic bags.
7. Get as much water out as possible but leave the nasty water near the bottom.
8. Use a scoop to remove all the sand. I didn't reuse the sand, I started with new sand. Keep one cup of sand to reseed the new sand.
9. Move everything to new house.
10 Wash tank inside and out, cleaning out rear chambers using a garden hose. This is your opportunity to get is pristine again, take your time and clean i right!.
11. Put the tank back together. Add rock, water, fish and corals.
12. Have plenty of extra saltwater on hand, you'll need it to replace what you didn't take.
Enjoy!!