Assuming you are qualified to create this kind of offering, I think you can safely determine that there is need for this service. I know many doctors who struggle with the business of their practice and could benefit from coaching.

That being said, if you believe this is an area you want to devote years of your life to, I would consider the infrastructure that will be required to support your success.

Over time, you're going to want to build out the following (or a version thereof):

Creating your brand identity
Building your website
Developing your funnel to generate leads
Developing your pricing model
Inbound marketing strategy and execution
Social media strategy and execution
Sales strategy
Long-form content creation for email capture
Short-form content creation for traffic generation
SEO for organic traffic
Advertising for paid traffic
Presentation planning and coaching
Possibly a book

I would recommend thinking about as much of this ahead of time as possible to give yourself the greatest chance for success.