Do not give away your pre-construction products to potential customers. This includes estimate line item details, specifications, material take-offs, subs and suppliers, schedules, and ideas. Some people are educating themselves at your expense and will use as much of your time and all of the information you give them without ever using you. Design your sales process so that clients sign a contract before receiving this information.
 A friend tells of a time he designed and drew an addition for a potential client, only finding out that he was not getting the work as he drove by the home and saw the addition being built using the plans and specs he had provided for free.
EOB, Customer Notes