I agree, you have to do what feels right for your business and whatever it takes to maintain your peace of mind. On the other hand though, because so many home inspectors shy away from including cost estimates and code references in their business plan these items can create a very lucrative profit center or help an inspector acquire more than his fair share of business in an otherwise down market, something to think about.

I would hazard a guess that if that if someone is ever sued because of a cost estimate or some bogus code related mistake, the rest of the report was most likely riddled with other super negligent items and the whole report was hopelessly SNAFU from get go.