There are lots of double and triple deckers in New England. T
More often than not owners occupy one of the floors. As an owner you are able to enjoy many of the pleasures of single family living whilst having a second income from the rental.
I have seen many owner occupied double deckers with an empty unit. The home owner resides in one or both units. I always wondered why this was? When asked the owner always stated he had rented to a nutter and did not want the stress of someone above or below them anymore. The rental income was not worth the stress of having someone infringe upon their privacy. They were sick of sharing the yard and driveway.
I, too am one of these people who wants the driveway just for myself!