I think you will see the Asians bringing in the prefab boxes, made in China of course. Then they just stick them one on top of the other, 20 plus levels high. Cheap as chips to make, and put together. You would probably get 40 or more onto a 1/4 acre block.
The kids want to live in the middle of the action, so they will give it to them. Only need bike racks, no car spaces either. They will be like upmarket backpackers digs. Cheap to build, buy and rent. If the market is there, there are plenty of smarts out there to provide it.
