An interesting point. The lightweight motorized bicycle as a utility vehicle for situations like that.
Lightweight enough to carry around / over some obstacles, or upstairs to keep it dry. Easy on fuel. Able to carry a single rider & some groceries farther & faster than walking.
No ongoing costs to maintain as a backup - no license / registration / insurance in many parts of the country.
My TW200 Yamaha has that job now. But I have to keep it registered & insured, so that I can ride enough to be ready to use. I could build a new motorized bicycle every year for what it costs to keep the TW200 on the road (legally).