Organizing a walk to raise awareness and $ for epilepsy in the United States on foot from San Fran to DC?

My friend and I want to raise the U.S. $ and awareness walk, find a cure for epilepsy. How do I go about organizing and finding sponsors for an event like this? We would also nedd a SAG wagon or a support vehicle have any ideas or suggestions would greatly help us think! 45 minutes ago answer – 3 days left.