My brother and I have carried a portable AC unit to his apartment once. We dragged it across the parking lot to the bus stop, took it on the bus, took it off the bus, crossed the road, took it into the building, and carried it into the elevator. In our case, I’d say it was worth it; the bus stop was right across the street from the building, so a car would not have reduced the effort by much. And the reason we even bought that AC unit was that the one my brother ordered on Amazon got stolen.