Thanks to Theresa Larson for bringing it to my attention.
Allsop WheelEasy folding wheelbarrow—and it can be hung from one hook, collapsed—mostly wheel and handles.
I looked for and found other folding wheelbarrow entries on various mail-order sites, but "no longer available" seemed common, and some designs were a bit convoluted. Easy storage and loading seem the benefits, but I can't well imagine one of these being forty years old and still useful, and compared to a traditional, manufactured wheelbarrow, it's expensive.
Still, philosophically, it's a good "Is this a wheelbarrow?" item, and look at the pivot of the handles to the axle/frame of the wheel, when it's hung on the wall.
We use a fabric wood sling with two wooden handles. Using this for firewood is like a wood sling with a wheel.
It's causing me to review what I know of slings and wheelbarrows.