Construction Cost Software-Accuracy

Carl,Regardless of what we end up doing, your website is a great resource! I went to the building-cost.net that you link to on your “Getting Started” page on byoh.com and have a few questions. Is the cost to build without the "contractor mark-up" what it would cost was an owner/builder? Also, there are a few of the sections, mainly the siding and roofing where the options (1-6) have things