Like I said. All other locales don't even come close. The only thing you are mentioning in your post is elevation. My friend, there are many more considerations that go into why Mauna Kea is the optimal location for the 1.4bil construction project for the northern hemisphere.   The part that you do get right is the second half of your post -- Mauna Kea is located in the USA...easy travel.....in paradise. Work for a few days....play for a few, on the same island.  Located in the most remote location in the pacific - it is Mauna Kea or bust.