What do you guys use to move beehives around?
As far as possible, I don't - seeing as bees navigate to fixed locations. But if I do, then I break vertical hives down to two boxes or less, strap them together, strap those boxes onto a sack truck - do the move, then rebuild.
I use a slightly modified sack truck, fitted with the same kind of inflatable tyres as used on builders wheelbarrows - medium inflation pressure to help 'iron out' the bumps a little - and pulled backwards. For success, so much depends on how pitted the ground is. The larger the wheel diameter, the wider the wheelbase, and the softer the tyres, the better.
Horizontal hives are bl##dy awkward to move. If they must be moved, then I usually transfer the colonies into standard boxes - then move the empty long hive, then re-install at the new location. In practice, such hives tend to either 'stay put' or are moved as and when they become empty.
I think you're quite right in wanting to have a 'handy tool' around the place, but not wanting to build something that'll only collect dust for much of it's life.
Some offerings from Mann-Lake and Walter Kelly:
LJ