Children’s Book Writing Coach Needed

My nine-year-old is determined to publish his very first book for his tenth birthday, and I want the finished story to be entirely his voice—just polished, structured, and ready for print. He envisions a short, engaging story about himself that other school-age children (7-10) will relate to... (Budget: $30 - $250 USD, Jobs: Book Design, Creative Writing, Editing, Fiction, Ghostwriting, Publishing, Writing Tutoring)