concretesubmarine.com/ FORUM

you might start with something like this – a cluster of floating structures – type marina – develop it to something like this.

a floating district of a existing land city. And finally develop it further to this.

A oceanic floating city.

answer:  to floating city building in San Francisco...

At any moment of the development you need to be in business with the boating sector, the tourism sector, the ship seatransport sector, etc…to earn money to finance the next development step of your floating city. The economic heart of the development needs to start beating with the first floating walkway (rent marina boxes to boaters, sell beer and tackle) and keep beating stronger every time you take a development step.
You need the right mix of “interference freedom” and “emerging economy” to make it happen – i would see San Francisco as a “highly redtape cluttered place” in a “sclerotic coding nation” rather than a ideal place to do such a thing. http://concretesubmarine.activeboard.com/t56351996/business-and-third-party-interference-freedom/
But the only really good way to get a clear picture about that is to put a couple of floating squaremeters out there and see what happens in a pilot project setup. For the Cartagena Marine Cluster ( http://concretesubmarine.activeboard.com/t46019347/small-honeycomb-floating-concrete-structures-in-cartagena/ )
i have already done half a dozend pilot projects – and aquired a quite good understanding how to tackle the matter on my location. I also got a widespread investor interest. So i asume you have to do the same at your location…

It is interesting