engine - 6:08 pm on Jan 24, 2013 (gmt 0)
Forgive me if I missed it, but, what I understand is that you're trying to find a way to get someone to fit into a scheme you've outlined.
Why limit it to that scheme? How about paying a freelance marketer to do the marketing for you, and then, when the site is a success, you get to keep all the profits.
Also, why offer 50% to a partner. If you offer 49% you will retain a controlling interest.