That is awesome Ed, $31 at a yard sale!View attachment 68702
Excellent advice by Jason for you . I made mine from an old portable and it works very well . Find yourself a two vacuum motor portable on Craig's List from the 90's or early 2000 's .
Most will be series machines with very low power two stage vacuum motors that can be swapped out for much more efficient and powerful ones . This is a Prochem Cheyenne from about 2001 that I purchased at a yard sale with the wand and detail tool for $31 . Since I already have a booster this is now being stripped out and retrofitted with a different pump and better vac motors for my back up and when I have to take a machine inside a building . Hope it helps !!
All the Best, Ed