Contact the AERC, if you plan to do an Endurance Ride it has to be sanctioned
by them. Locals might be more Charitable, you could also put on, along with
the endurance ride a 10 mile poker ride. The way to go is to get a lot of
volunteers and be carefull of award expenses. If you hook up with someone
that already puts on a ride you can make better profits, they will already
have the organization you need along with existing supplies.