Here’s the thing about an “arsenal.” Using the “guns are tools” analogy, there’s no “one-size-fits-all-purposes” firearm.
Rifles of various calibers are used for hunting various sized game.
Shotguns of various gauges, ditto.
Recreational shooting will also involve various calibers and gauges, potentially different than hunting weapons. I have a double-barreled 12 ga. I bought with the intention of using for Cowboy Action Shooting. It’s merely “Okay” for home defense, not suitable for hunting.
Home/self defense firearms will be yet another category of handguns/rifles/shorguns, often in calibers, gauges, or configurations not suitable for hunting.
There is some overlap; I have several handguns that were, at times, available for home/self defense, but that I also routinely use for purely recreational shooting at the range.
I don’t hunt (though I have nothing against “meat hunting”), but I do have one rifle suitable for hunting, though it’s a bit over-powered for most local game.
I also have a few suitable for “When The Revolution Comes!”
Not military-grade firearms, these are the classic “Assault Weapons” some folks would like to ban, but they are also suitable for recreational target shooting, if not much else.
Until The Revolution comes. Viva la Revolucion!
So, I have an arsenal, by the definition Kalhoun provided. I don’t
Given the cost of ammunition, I do keep my eyes open for “bargains,” and will load up on ammo (heh) when the price is right. Not in anticipation of going on a killing spree or fending off hordes of Black Helicopters; just common-sense consumerism of “buy cheap in-bulk whenever possible.” I apply the same philosophy to paper towels, socks, and toilet paper.