I've moved a cpl tanks in the past.
Here's what worked for me.
Measure your rockscape and calculate water content of tank and sump if you have one.
Make a (written) list of all livestock.
Go to walmart or similar store. Get a tub as close to rockscape size as possible. Too big and you won't be able to cover it with water.
Buy tubs and trash barrel ( plastic) That will hold greater volume of water and a bit oversize for rockscape. As in 40 gallons of water? by 60 gallon barrel or better yet two 30 gal barrels. DON'T forget the lids ! Remember, the tub for the rockscape will use some water. Maybe more than the contents of the tank. In that case you might not need the extra tubs.
Gather sufficient 5 gl buckets to hold fish and coral.
Stop by LFS where you have made friends with the owner/employees ( you have done that right ) Ask for sufficient bags to hold one piece of livestock or coral each. ( don't forget the rubber bands )
While your at the local fish store, buy new LIVE sand as well as 15 gallons of salt water ( or make it up yourself) Take that to the new house and bring the water to temperature. Go back to the LFS and buy more water to make up the volume difference in the oversize tub for the rockscape. Bring that water up to temperature.
Take all the rest of the stuff back to your old place. Go with a friend and vehicle large enough to carry all this stuff and remember to bring some clothes line or light cord to tie everything down during the trip.
Only try to carry water in 5 gallon buckets. Not the drum/barrel, tank or tub.
This means that the rockscape will be the toughest part of the move.
Once you've got everything in place and new water is up to temperature and you're ready to move.... gather coral and place in plastic bags with water and air just like you get when you buy a fish. put those into buckets. Stacking is ok.
Now, start to drain the water from the tank into buckets and carry them to the tub in the car. have the new water near the car to top off the tub.
When it's time for the rockscape, wrap in in a lawn/leaf type bag, carry it to the tub already in the car. Take it out of the bag and place it in the tub. Top off the tub until the rock is covered.
Now the fish are exposed and can be netted. You should still have 6 inches or so of water in the tank. They'll be easy to catch. Bag em and bucket em.
Check that everybody is out of the tank.
Drain the rest of the water. It will prolly be too cloudy to see everything remaining but this is not a time for delay. Drain the rest of the water. look for anything moving. Dump the sand. Look closely for any thing moving. You did make and inventory of all your corals and critters right ? Do the numbers match ?
all water, coral and critters should be in the vehicle.
You might take a few minute to wash out the tank. rinse and load.
When you arrive at the new place, set up the tank. You can connect plumbing later.
Moving water back into tank:
You can either bucket or use a power head. If you pump, get a hose long enough to go from car to tank. NO not garden hose. then have a DIY return fixture made of 1/2 Pvc. it hangs over the side of the tank like a U on one end is a T that goes in the tank but not to the bottom. On the other end is a hose barb sized to fit the hose from the pump.
If bucketing, don't pour water directly from buckets to tank. The sand will cloud the water too much. Use a pitcher and gently place the water in the tank.
Place the NEW live sand in the tank. start the water running or the bucket brigade. install the rockscape. As the water level increases, float coral and fish bags.
Top off with new water. Release the fish etc. Install power head for water circulation.
now start to place the coral.
Complete the plumbing, wiring etc. Wipe the floor , wipe your brow, thank you friends.
NOW pop in the move and have some popcorn.
I didn't read back to make corrections but if you read it twice, you'll be able to ignore this list and make our own.
cheers