I buy a fair amount of books. I probably spend somewhere around $100 or so yearly on books. I also have literal stacks of books taking up space in my bedroom, and huge piles of ebooks (free or purchased at a very low price) taking up space on my hard drive. That's your competition. Nothing personal, but there's no way I would even read a self-published book from an unknown author without third-party reviews, even if the book was free.