I had an Austrian made Unimat for decades until it got stolen. I made front-end steering mechanisms for 1/32 scale cars during the electric slot-car phase. It was configurable as a drill press or milling machine as needed. I worked brass, mild steel, and aluminun as needed. It was as accurate as...
So you paid $100 for 10 years of use, based on what you find from tear-down, i'd probably side with your wife. I got by for 24 years rebuilding cheap VW Beetles until we had our third kid.
I used a splitting maul to break up limestone in a barn for a root cellar. The maul and splitting wedges produced the sought-after results plus garden curb stones.
SCUBA divers and firefighters (SCBA) use backpack compressed air tanks through regulators, but in your situation perhaps you could gin up a connection between one of theirs and yours. There was a change from on-demand to pressure-supplied SCBA and some departments may have replaced units...