"Slow Your Roll..."

My son has been in a wheelchair since he was little and ever since the 2004 Olympics he has been obsessed with marathons. He trains all the time, and he's actually pretty fast in his chair. He's made it as far as 18 miles at once, but I keep telling him that a marathon is over 26 miles, and he'll never make it. I don't want him to embarrass himself. Besides, there's no money in it. I'm pretty sure all those normal athletes have regular day jobs, and I'm very sure that my wheelchair son couldn't do any of them.
But, I guess some people would pay to see a wheelchair person try to roll a race. I know I would.