The Library has many books with sample business plans that can help you craft yours. You can find them by using the following subject headings:
Information on writing business plans is also available from the U.S. Small Business Administration. Look at some good examples, and find more information about your business in the SBA's Small Business Research Reports section.
The Small Business Development Center (SBDC), in part funded by the SBA, provides a lot of information targeting small businesses owners at their website SBDC.NET. Find more information about a variety of business types from the Small Business Research Reports and Small Business Help Topics sections.
Bplans is a good source for free sample business plans; financials are included.