Then you need to bribe a friend or two to help out. YOu will need to have some large totes or coolers. Add the water and LR in a couple and then the fish in another or two. Keep powerheads and heaters in them to keep the water aerated and warm. You will need A lot of new water made up, warm and ready, and you should also cure your new rock since you have to commit so much time and energy into the move and don't want any
losses.
When the day comes, start early, break down the old tank into the tubs, set up the new tank (you could do a mock up of plumbing when its still in the garage) start adding your sand, rock and water and finally corals and fish. If your quick you can do it all in less than 14 hours.
Otherwise, try to find a temporary tank you can move stuff into to while you set up the 210. Its a big task your taking on. It wont be easy no matter how you do it.