This paper and toolkit may be very helpful to you.  Practical tips and templates based on experience.

http://foresters.org.au/u/lib/cms/a_toolkit_for_developing_a_social_purpose_business_plan.pdf

These articles and books may prove helpful:

BALLE A Guide to Community Capital

Ben Brangwyn and Rob Hopkins, The Transition Primer (The Transition Network, 2008) free download

Amy Cortese, “A Way for Local Businesses to Grow,” New York Times, October 24, 2014)

Amy Cortese, Locavesting: The Revolution in Local Investing (New York: John Wiley and Sons, 2011)

 Lyle Estill, Small Stories, Big Changes: Agents of Change on the Frontlines of Sustainability (Gabriola Island, BC: New Society Publishers, 2013)

Carol Peppe Hewitt, Financing Our Foodshed: Growing Local Food With Slow Money(Gabriola Island, BC: New Society Publishers, 2013) Review by Art Menius of RadicalLocalism.com

Rob Hopkins, The Transition Companion: Making Your Community More Resilient in Uncertain Times (White River Junction, VT: Chelsea Green Publishing, 2011)

Marjorie Kelly and Sarah McKinley, Cities Building Community Wealth (Takoma Park, MD: Democracy Collaborative, November 2015) free PDF download

 Michelle and Derek Long, A BALLE Manual (Bellingham: BALLE, 2012)

John McKnight and Peter Block, The Abundant Community: Awakening the Power of Families and Neighborhoods (San Francisco: Berrett-Koehler Publishers, 2010)

Peter North, Local Money: How to Make It Happen in Your Community (Cambridge: UIT Cambridge, 2010)

Michael H. Shuman, The Local Economy Solution: How Innovative, Self-Financing “Pollinator Enterprises Can Grow Jobs and Prosperity (White River Junction, VT: Chelsea Green Publishing, 2015

Michael H. Shuman, Local Dollars, Local Sense How to Shift Your Money from Wall Street to Main Street and Achieve Real Prosperity (White River Junction, VT: Chelsea Green Publishing, 2012)

Michael H. Shuman, Going Local: Creating Self-Reliant Communities in a Global Age(Routledge, 2000)

Michael H. Shuman and Kate Poole, Growing Local Living Economies: A Grassroots Approach to Economic Development (Bellingham: BALLE, 2011)

Woody Tasch, Inquiries into the Nature of Slow Money (White River Junction, VT: Chelsea Green, 2013)

The Social Enterprise Builder at http://www.socialtraders.com.au/start/dsp-default.cfm?loadref=168 is an online social enterprise business planning tool. It was developed in the Australian context but may be worth a look

Good day. You might have a look on Canvas Business Model, which now become popular among creating a business plan. Thank you.

http://www.tandfonline.com/doi/abs/10.1080/13602381.2014.929300?src=recsys&journalCode=fapb20