Consider an electric cargo bike if you're life will suite it.
Don't they have proprietary batteries? So you're out of luck at end-of-life if that company still isn't in business. And if a part fails are there replacements?
I'll give you the price is cheap. But if we're just looking for cheap then OP has nothing to worry about. There's cheap transportation in a variety of forms if you buy used.
don't get me wrong - I encourage everyone to ride a bike where they can. However it is for health reasons not saving money.