I used to work at a little place that had quite a few walk in vaults. I had to open and close them every day.
That door with dual spinners will not be a quick open setup if anyone spins one by accident. I'm guessing they are both 100 digits. Do they still spin free?
I get the idea of wanting to put it in your next place. Would you actually use it as a locked room?
The weight is a factor in convenience. It's a lot to move even with perfect hinges.
Those doors are a bit dangerous if you're not careful. Once they start swinging, they have a lot of momentum. A true taper will crush and the right angel will shear if something is that deep into the opening. I'm guessing that the stainless is just a fake skin put on for looks. If you build a frame and try to hang the door, the stainless will probably get damaged. Maybe try to peer underneath where the skin already looks loose. I bet the real door is just a multi step square angle.
There would normally be an inside cover skin. It's nothing fancy in most cases. You could make one out of whatever material you desire. It should also allow for internal release. I can't see a single throw lever, but I'm guessing it had one.
With all the practical stuff aside. That's a pretty cool thing to try and use if possible. It takes one heck of a wall. Go out and drop 1,500 lb weights from about three feet onto unsupported building materials for awhile. The structure that lasts will be your wall construction. A true vault needs more than walls.