Maybe they could be rented? Like you just take an air taxi when you're in a hurry? (and can afford the fare)

And they only land on top of big buildings, so you either live in one or take a ground taxi to the nearest big building, then an express elevator to the roof?

I could see a world where this is common, but it costs a couple hundred bucks or so - possible for most people to do it occasionally and a few to do it often.