My buddy just got a real nice "big" fire rated safe at a real good price. The boy he got it from delivered and placed it for $30, to cover his fuel. Where are these boys when I by this stuff!
He had a power hand truck that had an extra set of drop out casters, so it could stand alone with the safe on it and be wheeled about, and also raised and lowered whatever was on the truck, so it could negotiate stairs. Pretty slick actually.
Whole affair took 20 minutes from the time he got there till the time he left. nothing scratched, nothing broken.
I used something similar (wasnt powered) back about 30 years ago when I got mine. Borrowed it from the shop I got the safe from. It worked pretty well. About 5 years later, I moved, and rented something similar from a rental shop. It looked like it had been through the wars, but they said it would easily carry the 1000 pounds the safe weighed. It did, for about a minute after I got it up on the rear casters, and then it proceeded to collapse, nearly breaking my arm as it went down. Took about a half hour to get the feeling back in my arm.
The next time I moved it, a friend recommended a piano dolly. Next to that power hand truck, its the shizzle. One person can get the dolly strapped on, and a step on a lever on each side, lifts the safe up on casters. Once like that, one person can easily wheel it around on a hard surface, and it moves easily on carpets with a couple of pieces of hard pressed board. Wheeling it out a door, up and down ramps, etc, takes a couple of people though.