I saw an article at ""Working Mother " megazine(maybe Jan. 2003 issue). IN WA, there are 2 women opening a "Dream Dinners" Kitchen. They prepare all the ingredients, receipes. You go to their Kitchen once a month to assemble 12 nights' "ready to cook"dinner. You just go home to freeze the ready to cook meals. During weekday, you just heat it and ready to eat.
Their web site is
http://dreamdinners.com/
Although you don't live in WA, You can go to their web site and have some ideas.
I also searched the web and found this;
http://www.cgin.org/manual/toc.html
http://ouray.cudenver.edu/~eatoombs/Cooking_Co_op.pdf
And found this book at Amazon
How to Start Your Own Food Co-Op (With a Little Help from Your Friends): [a Guide to Wholesale Buying]
by Gloria Stern
Maybe you can find it at your local library
Good Luck!!