Student Exchange Programs

Me and my friend want to go to the 2012 summer Olympics.. she has a cousin that lives in england and then we want to see our friend that was an exchange student at our school who lives in Turkey. Do you have any ideas on how we could raise money for this? Also how much do you think something like this would cost. For a plane ticket from America to England at least one ticket for an event at the Olympics a plane ticket to turkey from england and then back home?
Thank You!