[Aquattro]

I recently moved a 75g and found it not too much trouble. If you have a plan ahead of time and enough buckets and towels, it shouldn't be a big ordeal. Try to borrow/rent/buy a couple of spare heaters and an air pump and the corals can stay in a rubbermaid tub all day. I assume you have a vehicle? You might even be able to transfer all the water with the tank. I brought all my water to my new house when I moved.
If not, RO water can be bought at most grocery stores.