Earlier quoted context omitted.
Like BlueSeed? http://venturebeat.com/2012/05/06/blueseed-startup-ship/ (How do I create a link on HN again? The one place where a "help me with formatting" link would do some good - the reply page ( http://i.imgur.com/R8oS8.png ) - of course doesn't have one.) (Edit: Turns out the "edit" page does have it, and shows that there really isn't a way.)
Oooo.. that's nice, but a pricey way to do it. Buying existing liners, rafting them up and retrofitting would seem like a more achievable aim in practice. You could probably get some off Costa at the moment for less than the market rate.
Sure, you're not burning a ton of fuel a minute plowing through dolphins and kelp, but you still need to generate power to operate all of the on-board facilities such as electricity, plumbing, elevators, etc. Would the city allow an entrepreneur to run a fat power cable onto a sitting ship - leaving aside political implications of a big honkin' vessel blocking the ocean view, are there even any regulations written for it?
Based only on what I've read of jwz just attempting to put a door in a nightclub wall, it seems that a hostile takeover over San Francisco, followed by some summary executions of most of the city government and a formal secession from the United States of America would be easier.