Cool idea, but man, I don't think I"d trust myself at this age with nothing to do.
I'd love to not be tied down every day, but I know if I had money and free time, I'd spend it pretty hardcore. Morally, for me, I'm not sure it'd be the right thing to do even if I could retire right now. Plus, I have 3 kids that I get to spend time with and I think it's important they see Dad knows to get up and go to work in the morning.
I own my business, I'd rather make myself a 3 day a week job and keep reaping the income I've got a pretty good gig going.