True enough ... this setup turned out to be not all that "inexpensive".Probably well over a $100 when the dust settled.
The 1/2" x 8' copper tubes were about $20 each, plus all of those elbows, and of course the ball valves and air brake hoses. Not to mention a little material being scrapped along the way.
As with most of these inventions, the budget seems to multiply exponentially! LOL