I plan on amassing a firearms arsenal that will eventually contain 1,000 firearms, which is a reasonable number of firearms to own for a firearms arsenal.
Not really for a personal arsenal.
I have several different kinds of guns because different guns have a different purpose (eg. hunting, trap shooting, varmints, recreation, scaring your daughters' boyfriends, etc) but I also understand that I can only shoot one at a time. So having more than five or six, to me, would just be silly.
Guitars, on the other hand, much to my wife's annoyance, I can definitely see me with 1,000 guitars. Although, in all fairness, as I get older, I find myself returning more and more to the keyboards. Just bartered some tree work for a Hammond B-3, which I've always wanted and got the Leslie for free. But I digress.