Thanks to everyone - my business partner and I are in the midst of this process at the moment. He has a background in business and, hopefully, that will keep us on track to stay on target. That's really why I'm trying to quantify all of this time and value.
I like the idea of "Actively seek out every possible reason for failure, come up with a behavior to counter it and put it into the business plan. Decide ahead of time what will cause you to quit." That's not something I am used to thinking about.
I need to think about how I can say what I'm thinking and then I'll get back to you. Besides, it's time to pick up the kids from school;-)