Remember this is the actual event. You will be fatigue come the end of the race and need to recover. The sleep thing is a fine balance between safety and longevity, and performance.
Here’s a success story: Polyphasic Sleep – Steve Pavlina
He makes it sound fantastic. I just had to try it - a couple of times. I got sick (cold/flu) about 10 days in each time and had to abort… I don’t really think the polyphasic schedule is possible with any sort of athletic loading, like daily sprinting…