When we stuff up renovating or building, it rarely involves tens or hundreds of dollars. More often than not, it means thousands, tens of thousands, and sometimes hundreds of thousands of dollars extra. For many things in our lives, we can correct our mistakes. Have another go, and do better next time. Yet, when it comes to building or renovating our family homes, most of us only do it once or twice in our lifetimes. The expense is big, the decisions are permanent, and the ch