Hi there.
I've been helping to create business plans for years for start-up, expansion and acquisition financing.

The document doesn't need to be long, it just needs to answer the pertinent questions:
1. What will the business do?
2. Who will the business serve?
3. Are there enough of these prospects?
4. What does the sales cycle look like?
5. Based on this sales cycle, what are the projected financials?
6. Why are you the person to execute this?
7. What could go wrong?

Most importantly, a business plan should not be a document created to entice a lender to give you money. It should demonstrate to you that the idea is viable.

I've worked on many plans which ultimately proved that the subject business either wouldn't work, or was likely to return too little profit for the investment and perceived level of risk.

Creating a plan that makes you back away is more valuable than gold since it will not only save you lots of money but, potentially, years of your life.

Cheers and let's connect if you'd like to discuss your specific project.

Thanks

David C Barnett