If you can't convince an investor like Evan Williams could, then you need to either be extremely frugal and keep your day job for a while, or quit your job and

If you can't convince an investor like Evan Williams could, then you need to either be extremely frugal and keep your day job for a while, or quit your job and bet your life savings, or don't bother. There isn't a "bootstrap to become the Next Facebook" path.