James Wesley:
For use as an unobtrusive and inexpensive alternative to purpose-built weapons safes, I recommend finding an old, non-functional soda vending machine. Remove the guts (we call it the ‘stack’) and refrigeration system, but leave the lights in the door. (Be careful, the light ballast wiring will bite: 5,000 volts).
Tap into the 110 Volt AC wiring on the vending machine to power your Goldenrod Dehumidifier [1].
Store your valuables inside where the guts used to be. Lock the door and keep the key. [If it will be at your private business but in a location that might ever be in view of the public,] you can leave the machine plugged in, with the lights on, and an ‘Out Of Order’ sign taped on the front. Consider this instant stealth storage. – Tom K.