As an entrepreneur, my first choice of source for writing a business plan would be the Small Business Administration (SBA) website.
How benefit does the website offer?
The SBA is a U.S. government agency dedicated to helping small businesses succeed, and their website provides a wealth of information and resources for entrepreneurs. They offer step-by-step guides, templates and tools designed to assist in creating a comprehensive and effective business plan.
Moreover, the SBA's guidance aligns with industry standards and best practices as its ensures that the business plan will be well-structured and appealing to potential investors or lenders.
It also offer website offers valuable insights into various aspects of starting and managing a business which makes it a one-stop-shop for entrepreneurial success.