While I admire your persistence and work ethic, I feel it is imperative to let you know that the market rate for ghostwriting is AT LEAST $0.10 per word — or $3000 for a 30k book. This is at the very low end of payment, however…

With 20 books in your portfolio you should be making more like $0.20–0.30 per word. You have been VASTLY underpaid. I hope you gain the resources and courage to demand fair wages in the future, my friend, because you deserve to be truly compensated for your time and skill!