The sand pit method is interesting in that it opens a Pandora’s box of other mysteries. I’ll admit it’s possible, but unlikely. The ability to move that much mass around without leaving a trace, namely. Several obelisks arrayed in one place, as though several small mountains of sand were moved there, removed again, moved there again, and again removed, over and over. And then there’s the task of getting those huge stone blocks up those small mountains to begin with. However all-powerful those Pharaohs were, we’re underestimating them in that case. They did it somehow, though, I’ll grant that, we just don’t know how. All our theories wash out or are inadequate.
The stone movers understood things or had access to technology past what we consider them capable of. That said I am more and more leaning to ET influence. The Sumarian texts are very compelling and full of stories that are hard to ignore. In addition, the Stargate theory is of great interest. There are a few pictures in ancient Egypt structures that show a pharoh partially comming out of a door and no view of the part behind the door. Plus all the aircraft like objects that are found in South America. Modern hydraulics are very interesting, I have daily access to an industrial forklift that can pick up 36,000 pounds with ease. It is also possible the stone movers had some access or understanding of using fluids to move things.