Help Find Price of My Service

Hello this is my first post on this website. I am planning on starting a company here soon by I am having some troubles finding out how i should price partnership with my company. My company will partner with other companies. these other companies will pay my business to use my logo and say that they are partnered with my company. I will use the money to erect wind turbines and produce green energy. I will sell the electricity to electricity companies and i will use this money for the expansion of more turbines, and continual business costs. My partners will be helping the environment and by doing this it will give there business a better appeal and edge over their competitors. One of my reservations of starting this company is how I should market the partnership and how to make pricing fair to all companies. I thought of maybe a percentage of last year's profit or different levels of support. If you have any feed back on how I can do this or if you have any other suggestions on the way I could structure this company I would greatly appreciate your input. Thank you very much for your time and consideration.