Ok, kind of full circle here.
Since I have come back around to using a gas engine, and not being concerned about the regs...
Here is another option.
Yes, it's a Baretta 44.
Getting this put into my name is going to be a whole lot of waiting time, etc. Not going to be easy.
Every single moving part on this thing is rusted solid. Even the wheels will not spin. It is a total basket case, and will have to be rebuilt top to bottom. Including taking all the electrical switches apart and rebuilding them.
A LOT of work for all the resulting legal hassles, etc, because this state detests mopeds...
But once done, it would be easily put to use, easily stored, etc. Pretty much made for the purpose.
And I can put a crate on the back, and/or make the garden cart a lot smaller than a normal cart, and make it a trailer for this thing...
HEY! get this running, then make a pusher trailer, so that the trailer itself pretty much carries it's own weight, and helps to get everything including me, back up the hill!!!
I'm starting to see some light at the end of the tunnel here.