If you are looking for something designed for duty, the Japanese kei style trucks are pretty great. An EV conversion with a Tesla battery will give you excellent range and a bed that can be modified to hold more than most American pickups.
Some people don't even like changing their own oil, and you just drop an EV conversion as if were as simple as changing the lock screen background on your phone. Anyone who has all the tools, know-how and inclination to take on such a product probably doesn't need the suggestion in the first place.
I think a more realistic answer would be along the lines of "cross your fingers that the Slate Truck isn't vaporware, then buy that."