I've been pondering about how to get something like this set up for myself. I think it's what makes remote work most appealing to me. If I'm out of the office environment, there isn't a concern about "butt in chair" time, and I can work purely around productivity.

Sometimes I am at my desk and I can tell that I'm not going to get anything done for the next two hours, not because I'm in meetings, but because my brain is kaput. There's no reason for me to pretend to work. If it's 2:30, and I'm out of coding capacity, I could probably recharge with 1-2 hours of relaxation and rest, but that kind of thing isn't encouraged in an office. I'm supposed to work when I'm there. It's idiotic.