First, this is really more a feat of long distance cycling than touring, especially since it's sagged with a support team. There's a different forum here that specializes in just that.
I'm all for supporting charitable causes and leukemia is a horrible cancer. The web site says, "All of the money raised goes directly to the Leukemia and Lymphoma Society." It doesn't make clear whether this is after the (considerable) expenses of the rider and the support team are deducted or whether 100% of the money donated goes to the charity. When you start talking about thousands of dollars, the distinction becomes important.
Given the Uncle to whom Phillip is dedicating the ride died almost 40 years ago, the cynics will want some assurance that this is more about curing cancer than getting others to fund a "world record" bike ride (although I have no idea what record he is attempting to break).