Thanks for bringing up the re-inforced concrete ceiling as this is absolutely necessary for secure storage.
It might be easier to get you wife to sign up for this if you made a place for secure jewelry storage for her.
If this were 20 years ago and I still had a large house with a basement I would consider building a combination secure wine/firearms storage facility. I had around a 2000 bottle wine celler back then and this was a huge financial investment. I used to worry more about the wine than my firearms collection.
I suspect that some unique heat and humidity control problems would have to be solved to do this as a combination facility but it sure would make for an interesting project.
Jim
