Affiliate Marketing Secrets

Not necessarily a social network like Facebook, but a niche social network similar to goodreads.com and there would be a lot of downloading of pictures. I understand that I need a website designer, 1-4 good coders, & investors. Is this correct? I want it to be designed well, so I’m guessing this will cost me more.
Also, I need info for a business plan. How would I project yearly profits? I would include small ads on the site, but I have no idea how much that would bring in.
Also, should I ask this question on a “business” category instead of computer programming?
I’ve had a lot of Debbie-downers answer some of my questions, so please let’s pretend this is the best idea ever.