I have been an expert witness construction management consultant and have extensive experience in residential, commercial, etc projects up to $100M. I use AutoCAD for quantity take-offs and my own detailed Excel spreadsheets for the estimates which I also link to a proposal tab, a schedule of values tab, etc. but I can also use Planswift, OST, etc. (My full résumé: http://goo.gl/vWOXmo)