I like the overall concept and have used similar sorts of thinking in my life. I think it's useful to have a raw numbers audit of the costs in your life and to

I like the overall concept and have used similar sorts of thinking in my life. I think it's useful to have a raw numbers audit of the costs in your life and to figure out if they're worth it or they're things you could eliminate. However, I think at some point you're going to have to be okay with some "inefficiency" in your life, assuming you are doing okay financially, of course. Stressing about efficiency can take its toll on you mentally if you're the kind of person who likes to maximize every little thing.