The downside with having a not truly custom home builder take on a project like that is the amount of "supervising" required. It's been a frustrating process that has consumed virtually all of my free time. There have been several mistakes or miscommunications since they broke ground. To their credit, though, I think most of them can be traced to errors in the architect's revision of my original plans. None of that matters when I have to get on the phone yet again with the latest disaster. Hopefully all the agony will simply amount to a good story to share with friends after we're settled in our new home (garage).
Fortunately we kept a lid on it