I'm not sure if this is the place for a question like this, but here it goes... I'm needing a little business advice from some of the Pros here. I had a lunch meeting today with a freelance client of mine who is starting his own business. He is going into business development so basically his business will help others build theirs. He is needing my help for doing design work/photography. He said he wants to make me a partner and asked me what percentage I would want for my services. I'm not sure what to tell him. I want to price myself as a professional, but also not so high as to turn him away. I'm new to this sort of thing and this seems like a great opportunity, not only will I work for him, but also all his clients he helps out. What would you guys say?