You can do that anywhere- do you need capital? Then yes, SF has more (and easier) sources to find for capital. But really if I were you I'd build the thing fi

You can do that anywhere- do you need capital? Then yes, SF has more (and easier) sources to find for capital. But really if I were you I'd build the thing first- you can always move later if you have to. The biggest thing about building a startup is GET STARTED :)