But how much more income do you make in SF? I think most of these measures are based on cost / income. Also you tend to be bound to US / CA wide pricing in SF

But how much more income do you make in SF? I think most of these measures are based on cost / income. Also you tend to be bound to US / CA wide pricing in SF beyond a few very local services, so you can take advantage of cheaper consumer good pricing from the large US market.