This is what I did and it worked flawlessy and smoothly.
I would start by getting a few big styrofoam boxes with lids and bags that will fit in them. Put a bag in each seperate styro, fill half way with tank water and place corals in inside it. Then tie up the bag to seal the water and contents in.
I would get some 5 gallon buckets fill with as much rock as you can and fill them halfway with tank water and seal the lids.
I would use as much water as you can from the old setup, since 25% will probably be trash from it getting nasty and being filled with detritus.
Use another 5 gallon bucket for the fish and another for all the inverts.
Get a few small power heads and maybe an extra heater after the move to keep the water oxygenated for the inverts/fish, as well as a heater for them. Do the same for the corals.
I did this and it was really easy to re assemble my tank after my move. I also swithched a heater to te liverock buckets every so often to keep the temp up.
Depending on how the sand looks and or how old it is and deep, you might be abkle to keep some of it if not all.
I replaced mine since the other stuff was 3 years old. I did take 6 to 7 big cupfulls of the old sand to help seed my new sand bed.