So, a person who’s “not a gun guy” has either expended untold thousands of dollars to legally purchase fully-automatic weapons, somehow found them on the black market, or purchased and substantially modified multiple semi-automatic weapons — and did so with enough competence to create a sustained rate of fire. This same person also spent substantial sums purchasing just the right hotel room to maximize casualties. I cannot think of a single other mass shooter who went to this level of expense and planning in the entire history of the United States.