Hmm. Looks very similar to my own typical work day. Except I get up at 6 instead of five which means I have one hour less a day to spend per day. However, I would no be able to function properly after a while without that one extra hour of sleep.
You should give it a try. You might surprise yourself. I recently started getting up at 4 just to see what would happen. I've got a ton more time and occasionally need to take a nap around 5-7pm, but other wise have been fine just getting 4 hrs a night.
Hmm. I doubt that would work for me. Less than 8 hours sleep and I'll be s total wreck in no time. I also read somewhere (don't have references) that 7-8 hours sleep is optimal. Naps give me a headache. Can't sleep on a bus/train/airplane either.