Build a business plan service for new businesses

I want to build a service where I help people write their own business plans and start their businesses.

I’m looking for an experienced business writer or consultant to help me create a strong business plan template, structure, and guidance that I can use with clients. The goal is to make it simple and clear for beginners who have never written a business plan before.

This may include:

Creating a business plan template
Writing examples for each section (executive summary, marketing, finance, etc.)
Structuring step-by-step guidance for beginners
Helping me understand how to guide clients through the process

I want something practical, easy to use, and beginner-friendly.

There may be ongoing work if this goes well.

Please share any relevant experience with business plans or startup support.