If, in that time, the builder finds an owner who wants the hardware on top of the cable, the homeowner pays for the cabling. If the new homeowner is not interested in the hardware, the builder pays a reduced rate for the pre-cable, and we still have a lead.
Progressive builders are hard to find.
They didn't cable for telephones or lights before there WERE telephones and lights. I have found the best way to an installed system is via the homeowner. They are better able to see the real value in cabling their homes. They are the ones who will be living in the homes, not the builders. The following is copied from your site.