ok why do that? think of it as a means to learn and then proceed from there, down voting is just a means to lower an opinion because you don't agree, fine don't agree, but your opinion is no better they are all like asses, we all have them.
Here is an IDEA, shipping container housing, infinatley modular and to boot much cheaper, by almost half to 3 quarters the cost....i have been doing designs of these type of home for fun and you know what, i love them, not to mention the fact if i wanted i could pack em up and put them anywhere else, its not that we should seriously consider the change to the environment of San fran, for which i am sure there is merit in some cases, but why not make a location that can conform to your needs and then build how you want to build, live how you want to live, in a place that welcomes you... food for thought