Get a couple of trash cans from walmart for your water and lr
. Pump out all but about 1/2" water, leave just enough water in the tank to cover the sand. Very carefully move the tank with the sand and that bit of water to where ever you have to for the time being. As long as you keep the sand submerged and all the rock in water with flow and heat you should be ok. The fish can be kept in a small 10g tank while the floor is fixed, just make sure to keep the water topped off and some form of filtration.