How are you going to sustain that schedule? I could do that perhaps for a week, not longer.
in fact... it's probably one of the best ways to launch a bootstrapped company. it's both the motivation and the sustenance to do something meaningful with your career.
most people just surreptitiously look for a new job while on the clock, or dick around until the gravy train stops, but you can also just do your easy-ass dayjob and work on your startup at night until it's time to switch.
It sounds extremely distracting from your career.
It wasn't the only reason I was fired, of course; there were some other reasons, ultimately coming down to political-cultural clashes. But it was by far the lowest-hanging pretext. I seldom made it in before 10:30 - 11 AM.