I have done a similar project.
I will provide you a step by step understanding as to how the WhatsApp model works and how you can leverage your database of existing images to make money out of it.
I am a freelance consultant and at the same time work as the Business Planning Manager at India's leading automobile company.
To ensure that I provide you relevant content, I would like to know answers to some questions:
1) What is the expected format in which you expect it to be delivered?Do you want to have a word document ,pdf or a ppt document?
2) What is the expected size of the document that you would like to have?
3) Is this document for your self-reference or is it for public display?
I look forward to working with you on this.
Cheers,
Subin