Successful show business is incredibly demanding. Believe those who have actually done it. It is brutal, especially daily performances of *any* kind.
Unlimited stamina doesn't begin to describe the personal energy required to maintain a professional performing career day in and day out.
It's very difficult to overstate this, believe it or not. And the shortest part of the day is the actual performance. Personal prep, practice and rehearsal are the big time consumers.
Absoltuey, I used to do morning drive a few years ago 7-10 am and many a day I would crawl out of the studio at 10 and still have to go do my day job,got burnt out big time.