In the past I did a lot of things like this. My mom always told me when I was a kid, "Haste Makes Waste". And I believe she was right. Sure, we all get impatient from time to time, and mess up somehow and have to re-do it. But I guess for me, its the scale. When doing something of this magnitude, I try that much harder to have a solid design and execution plan. As with most good projects, the longest and most important stage is the planning stage.
Bart