[outericky]

Assuming you have enough money to survive the rest of your life, then retire. If not, you'll be back. And understand it gets harder with age. Want a family? those 16 hr days to run that business get nearly impossible. Want to return to work 18 years later at 50 because you realize you have at least 30 more years, and not enough money? Good luck finding that dream job.

Of course this is all possible, but it's very easy to be shortsighted.