Dude spends a day’s calories to hoist that cut stone 30 feet in the air
Hum... 4000kcal is ~16MJ, what would lift about 160 thousand kg by those 10m.
But yeah, it's missing all the components. Also, isn't the wheel supposed to be on the ground? What lifts the wheel into the top of the wall?
And there's no study to be found there.