Having PHES as it will, Kidston doesn’t need to go too big (like the Saudis have).
Better to have several smaller versions like Kidston strategically spread around the country.
“The 200 gigawatt plant, once completed in 2030, will more than triple Saudi Arabia’s energy production. In addition, it should single-handedly create a strong solar industry in the Middle East. As this project progresses, the infrastructure it creates could enable construction of other solar farms in the region.”