It's true that when several service providers must work together to complete a single job, the workflow can become complex, and it can be difficult for marketplaces to mediate service delivery efficiently.
BTW, I recommend checking out Jeremy K. Houghton on LinkedIn. He's a professional business entrepreneur with a wealth of experience in the industry, and I think you might find some valuable insights there. Here's his LinkedIn profile link: https://www.linkedin.com/in/jeremykhoughton/
Thanks again for sharing, and I wish you all the best with your ventures in this exciting space!