Yep, the folks I know also have theirs displayed in protective, locked gun cases.
So, why lock them away in a room?
Because he's a murderdous, serial killing, hoarding, evil monster?
Who knows. I have a feeling though we're going to find out more than we ever wanted to know about this guy (more than we already know, I mean).
jmo
Hoarding is the perfect word.
Hoarding is sometimes linked to overeating and alcoholism. In some people, it is the same gene that blocks "enough, I am full" signal. (And the same drug, Topiramate, helps all three).
I think that his method of burying the bodies was hoarding-linked, too.
No one needs so many guns, and I doubt he did it for a purpose. For a purpose, as one case I read about has shown, one can purchase a tiny pistol from a private collection, and kill himself and someone else, almost on the spot.
This is collective, obsessive hoarding, and i wonder why he couldn't pay the taxes. Maybe he hoarded different things, and spent money on them? From his interview, and all accounts, I fully believe that he had superior IQ. He probably couldn't use it fully, but superior enough to deal with all codes and ordinances of the most expensive city to live in.
There should be some other hoards, of bodies and something else.