I've moved my tank twice already.
I think it's better to do it in 2days
Buy 5g buckets at homedepot. Once your done with them you can return them hehe
1stday
1st thing to fill the container with water and then move the all livestock as much as you can in a 25g container with a power head and a heater
Move the excess water to buckets as much as you can save.
Move the live rocks in the buckets with water and if you have extra heater/pump put it in the bucket.
Next move the sand to the buckets and clean them with a water hose. Just try mixing the sand while your using the water hose.
(Or just replace the sand with a brand new sand)
Clean the tank and prepare it for the move ( if you have a sump try to save the water, cheato and rocks to a bucket)
Try moving the tank at the 1st day so the 2nd day your only moving the livestock and rock.
Try to move the sand and put some water after you put the tank.
Get probably 10g of new saltwater just in case you might need it after you put all your livestock.
Less stress and tiring for you and your livestock
Good luck