DR PowerWagon! got lucky right after having rotator cuff surgery and found one barely used that was for sale. I can put the equivalent of 2-3 regular wheelbarrow loads in it and drive it up the hill to my manure dump, and it even has a hydraulic lift for the tub. I’ll grant it’s had to have some parts replaced, but it’s still been incredibly helpful to have.
My other idea is to repeat another poster - battery powered tools, but they should use the same batteries. I have a set of Ryobi hand tools, to which I’ve added a weed whip and leaf blower. SO much easier to pull out the battery ones instead of fussing with getting gas powered ones to operate!