" Egyptologists claim that Khufu began construction of his pyramid so it would be completed in time to accept his corpse. I should imagine that while he was considering what style of pyramid he wanted, he would have been consulting his architects and engineers to see what was feasible. He also might have been interested in knowing how long it would take to build and how much it would cost. Using today's technology, modern stonecutters have estimated that it would take at least twenty-seven years just to quarry and deliver the stone. I wonder how long it would have taken Khufu's men using simple, primitive methods? "

― Christopher Dunn , The Giza Power Plant: Technologies of Ancient Egypt