At the risk of getting back on subject...
...seeing many gun owners buying multiple guns, which nonowners may find impossible to comprehend...
Compare a photographer, who may own a dozen or more camera bodies, and piles of lenses, filters, light meters, etc. Maybe a darkroom full of expensive developing equipment and perhaps several enlargers.
Compare a vintage car buff. If he's lucky, he may be able to afford several, which are rarely if ever driven. If he's wealthy, he may own six or twelve or thirty.
The same money could buy hundreds of guns.
People collect clocks. Nobody thinks it's incomprehensible to own a hundred collectable clocks or watches.
I'm a carpenter. I couldn't begin to tell you how many saws I own, of various types.
So why is it so strange for someone to own ten or a hundred guns? With milsurps at $50 or $100, a lot of other nice guns from $200 to $600, the same money that buys a bass boat or an old Mustang can buy a LOT of guns.
Even a few AR15s.
It's really just an expression of the unprecedented prosperity we enjoy. We are the richest people who ever lived (even I, a humble working man). There has NEVER been a society with so much wealth, leisure, and security as ours.
That's why so many devote themselves to rock climbing, or bass fishing, or collecting Barbie dolls, or motorcycles, or letterboxing, or translating the Bible into Klingon (really!), or Medieval Re-enacting, or Oenaphilia, or shooting. Because we can.