Each change of topic should be signaled by a header. Your use of color if you use any at all should be modest. Avoid the risk of appearing to substitute flash for substance. It offers the dual virtues of being compact and allowing sheets to lie flat while being read. A lot of information that you will be discussing in the business plan is based on research you conducted.
Footnotes are the preferred format.
Endnotes are ok, but force the reader to turn too many pages back and forth. If you report findings from your survey research, always indicate the number of respondents on which the statistics are based. The document should read as if there were one author. Try to use precise language. Editing is an essential task in putting this plan together.