Writing a book while on welfare is certainly a startup. She didn't self-publish the book. The publisher provided the funding to edit, print, market, and distrib

Writing a book while on welfare is certainly a startup. She didn't self-publish the book. The publisher provided the funding to edit, print, market, and distribute the book (which is not trivial money). Rowling pitched the book to several publishers before one decided to fund it. Oprah bootstrapped herself out of poverty to become a media billionaire. You might say she took the long way by routing through various jobs to get the money, but she still came from poverty, founded companies, and became a billionaire.