This one is really, really bad.
Lemme stop you right there.
This guy is supposed to be an uberbuff with the National Space Society, but he's rolling out the usual overpopulation canard.
TIL gold and silver aren't products.
And, just like that, a vague appeal to Say's Law, and the remaining 80% of the article are a mire - a voluminous but generic description of a Mars colony.
No business case made. You wouldn't even remember about the business case by the time you reach the end.