I am planning to build some steps from stone slabs. The slabs weigh a maximum of about 600 pounds. I need a way to move them around over ground like a lawn, so small wheels or a pallet truck are no good. Also, I need to move them into position, so just carrying them is not good enough. It has to drop the stone into the right place.
I am familiar with small cranes used to move machine tools, but those cranes typically have pretty small wheels and are designed to move over asphalt or concrete, not rough ground.
What are options? I think in the old days they had a thing used to move stone that was like a pair of long iron arms that were joined at a fulcrum where there was a wheel. You could manipulate the arms like tongs to pick up the rock. I have not seen these things in any modern context though.