Hmm, they should have gliders. If the average floor is ~800m above the ground, and the surrounding area is largely buildings less than 50m tall, then you don't need an active flying machine to travel over all the buildings directly from the tower to your destination.
Obviously it won't work in the other direction, and you'll need to bring your hang-glider back up, but hang-gliders are pretty light and that's a very solvable problem.
Obviously it won't work in the other direction, and you'll need to bring your hang-glider back up, but hang-gliders are pretty light and that's a very solvable problem.