Basically a fan motor froze up but the heat exchanger is also bad.

It was apparently the capacitor and AC motor fan. 

You fire them up and the freon freezes everything, or a small leak explodes, or the motor seized during nonuse.

You will find that repairs include basic motors, capacitors, solenoids, service calls (and potentially service contracts) etc which would account for your repairs / maintenance cost and then sometimes, they go completely out and you end up replacing compressors or worse, evaporator coil (which carries a cost of 1000-2000+ because of the labor involved) or the entire system.  

Of you are doing engine dyno's and things, there are a lot of good commercial spots by Las Vegas Motor Speedway.

The dust will also collect on the blower motor and act as an insulation making the motor stop working sooner than it would otherwise.

. $1,600.002 soap barrel mixing motors. $400.00New Security Cameras & DVR $900.00L.E.D.

And by the way he said, the property may have an environmental problem as he had been dumping motor oil in the back area.

Detroit has gone from Motor City to Mortgage City.

Also runs on a 9V rather than (4) AA batteries since the motor isn't working nearly as hard.