I like the solution you linked, Ben, but I was imagining a more distributed solution for my own situation.
I'd like 3 devices, I think.
1. Ben's linked safe for bedroom shotgun and my carry pistol. It can also hold my steel/competition/racetoy pistol that I might happen to have out of the main safe, too. Or my match rifle along with the shotgun. etc.
2. A dedicated pistol vault for the lady and her pistol. Bedside/nightstand/headboard discrete mounting solution.
3. A device to secure a shotgun I keep in my office closet (I work from home). Ideally I'd like this one to mount horizontally, inside the closet, above the closet door.