With regards to moving the tank, it's not that it's a hard thing to do but, you really need to plan it out and have a few things in place prior to attempting it... This is how I have done it in the past 3moves for friends and never had major issues.
Some, if not all of the stuff below you might already have, also use as much of the original tanks water as you can keep...
Moving containers (5-gallon bucket cleaned, bet you have a surplus from all the salt you've used?)
Holding tank/s (nothing special, brute trash cans are you friend)
Air-pump and Stone (this is just to aerate the water in the holding tank while the new tank settles)
Heater and/or fans (this is just to keep the water in the holding tanks at proper level, might not be needed)
Gloves (seems silly but, I got a nasty sting from the 2nd tank I moved think I crushed a bristle worm or something)
Tupperware Containers (used for capturing livestock, I don't like nets, and don't let the wife see you lol)
Note: If you are going to leave livestock in the holding container for a prolonged time, and have corals also, you should consider things like lighting, skimming, activated carbon, heater, ATO, temp-probe etc.
Time wise:
The 75g took 4hrs to move and 2.5 to set back up.
The 60g took 2hrs to move and about the same to setup.
The 180 was about 6hrs, the corals had encrusted over the live-rock and had to hammer them apart, this tank took 2days to set back up as the filtration was a little elaborate.
Sand:
Not a fan of reuse it as the trapped organics might and can leach out, have always opted to use fresh sand, or rinsed out old sand <--- that's one heck of a process and not fun!
One thing I try to do is remove as much water first without touching the sandbed (leaving about an 1" or 2" for fish and other inhabitants), followed by coral, rock, fish, cleanup crew and very last to go is sand. In this way you help prevent (as much as is really possible) fouling the water that going into the other tank. Also the suggestion to blow off the rock as a good one, considering doing that in an isolated container of either newly (aged appropriately) mixed saltwater or change out water from a recent water change.
Hope that helps you some?
