When Should You Hire Help for Writing a Book?

I’ve been working on a book idea for a while, but balancing research, structure, and daily life has been harder than I expected. I’m now wondering when it makes sense to hire a book writer instead of pushing through alone. For those who’ve tried both paths, what worked better for you? Did collaboration improve clarity and progress, or did solo writing feel more authentic? I’d love to hear real experiences, tips, and lessons that could help others facing the same decision.