The T10 is a single seater with a 600W motor (which is classified as a motorized four wheel bicycle -- 600 watts is less than one horsepower). Lead acid batteries and other things from the last century.
Dimensions in English units are L 88" W 46" H 53" weight 638 pounds. Top speed 34 mph
It can get a bit smaller, but this is still extreme. Somehow I don't think this is the ideal car for Colleen I would bet a lot that she couldn't get in.
When you get in this size class, perhaps the ideal vehicle is a bike. Speaking of which, a reader sent mail saying that his family (husband, wife, ten year old son) have just downsized to a new Honda Fit. His ten year old car died and when they were looking at a replacement, they decided to get rid of her almost-as-old car. They're learning how to juggle, but think it is very workable. They realized they only needed something large (his old car was a Ford Explorer) three or four times a year, so they'll rent.
I wonder how many families are looking at getting rid of a car? It may be the most direct way to free up a lot of money for most families.