It will be of very great use for him if he creates a business plan even though he does not expect to use any outside financing.
Explanation:
As we know that a Business Plan is a written document that details how a company will achieve its goals. Few good companies last long without one. Business Plan give directions to new companies while the established ones use them to determine new ventures. A business plan should paint a clear picture of the costs and drawbacks that come with each important decision. Operating a business without a plan is like swinging on a trapeze without a net. It might work but the benefits a plan provides are abundant.
Shawn has a chance to test a service even though he is funding the project himself. Shawn also has the opportunity to think through an idea before sinking too much money into it.