I STAND BY THIS MAP SHOWING PRE-FAB ON THE RISE. I TOO WAS IN CONSTRUCTION FOR 17 YEARS AND I KNOW THE DIFFERENCES BETWEEN PRE-FAB AND PRE-MANUFACTURING. YOUR COMMENT SAYING THE MAP HAD " NOTHING TO DO WITH CONCRETE PRE-FAB HOMES" WAS FALSE. YOU THEN WENT OFF ON OTHER RAMBLINGS ABOUT HOW STUFF IS SHIPPED OVER ROADS. PLEASE DONT INSULT MY KNOWLEDGE