I picked up a Diebold cashguard for $700 dollars and I absolutely love it. But a couple things, it would offer NO fire protection.... and mine was only rated TL15. I built wood gun racks inside it and it's great. Night and day compared to the "gun safes" sold at the big box stores, just no comparing it. I don't think trying to make it fire proof is even worth trying, it was never designed for that and I don't think it would work. It would be a night mare to make a new way to seal the door for fire. For 3k though, look at banks that are under construction (remodel, changing names). And see if they are getting rid of the "portable vault" often they are not rated, but they are often fire proof but think weights in the thousands of lbs.... They are often "free" but cost a few grand to move....