edit: there are also a number of people who have street parking only. Look at any older neighborhood, it could range from Queen Anne hill in Seattle, to many parts of Boston. Houses may have neither garages nor alleyways.
In theory, you could also run a 100% rated breaker to pull more power, but the car would have to be able to support it as well.
Also, I can optimize for lifestyle changes more easily (choosing to have a garden or not, living with more people or less, moving to a more luxirious or a cheaper condo based on my earnings,...)
Not that I've seriously pursued this angle but napkin math tells me it would either break even or cost more to Uber.
Bike?
What I will say is that I was in a car incident while I was taking a ride share (competitor of Uber) and for me it'd be worth it just to not have to deal with the aftermath of something like that.