I don't know, but they say that every pyramid took at least 15 years to build and for every pyramid that was built some 1000 people died.Money didn't come into the equation in the modern sense of...
The 4th dynasty Pharaoh Khufu who reigned between 2589-2566BC. He didn't build it himself he got thousands of slaves of slaves to do the job. 10,000 to 30,000 naked slaves toiled under the blazing...
The Ancient Egyptians believed that their pharoahs were gods, so, they built tall pyramids to help their pharoahs into the heavans. The pharoah that ordered the Great Pyramid of Giza to be built...
Like many things about the great pyramid the 'cost' is not known - however it is more than likely that the 'cost' would not have been a factor.
It has always been there, known to be there and seen...