Take one closet in your home and install a exterior steel door with pressed hinges you cant remove. Has a deadbolt, rout in a steel plate in the jamb for long torx screws to go in to a stud, which now is the strike plate. Mount the door so you have to open it out. Your not kicking it in then. If they want in that bad they will be stopped by nothing. Someone could chain saw your house open if they wanted too LOL. But a door like that can be bought for that range, and even a decent one used on craigs list. Not being able to remove hinge pins is the key. And any room will do, or just frame one up in the basement. You now have a secure gun "room".:thumbsup: