Just had an idea (not saying it's a good idea... you be the judge).
So we all know bending over to weed is a pain (literally).
Which is why ingenious people have come up with moving weeders where you do your thing while electric motors move you along, like:
https://hackaday.com/2019/10/15/solar-powered-weeding-tractor-uses-manual-labour/
https://www.greenlaunches.com/transport/farm-lying-down-with-the-solar-powered-wunda-weeder.php
But, while cool, they're all quite large, steel, and compaction-ey.
On the small scale, you have the little ole lady down the street thing, just little wheeled seat she can sit on and tend the petunias (or whatever).
Well, I was wondering... why not combine the two?
Take a cheap little wheelie cart (preferably one with a sealed compartment... and small enough to fit between garden rows.)
(
randomly found on amazon)
And jam in some motors/battery off an old electric skateboard.
Viola! Small, compact, and you don't have to get up to move.