I did a similar thing for a while, when working on my startup. Actually, I free-wheeled it. I stopped trying to go to sleep, and just slept when I needed to. I'd typically crash between 4am and 8am, sleep for about 4 hours, get some business work done, take a 3 hour nap, and then get into my night routine.

It was fantastic for when I had solitary work to get done. Not so great for social life. I could go out, but that would be like taking half a day off.