12K for that truck - NO, DON'T DO IT. I've those trucks go for far less with the same miles! Its the hours of running time not the miles on military vehicles. My advice, get what you can pay cash for. Debt is not your (our) friend.
Some friends and I had the same idea one day. Ours didn’t turnout so well. One shot shattered a BIG set of windows! But then again, maybe wewere using too big a caliber and too hot a load. It was still fun and not mywindow.