I should just shut up and stay out of this...
But, I won't. ;-)
I made the money to build my car washes by defying that "Quality and Cheap Don't Go Together" theory. Actually, inexpensive is a better term than cheap.
We kicked the roofers in this region's butt for decades by defying that theory. We bought liquid asphalt directly from the asphalt plant in our 6,000 semi tanker for $1.37 when everyone else was paying $2.50. We bought granules by the railcar in (1100) 100lb bags for $5 when everyone else was paying $10. We bought polyester felt directly from the mill in Spartanburg SC for $2/SQR when everyone else was paying $10+. Our high performance spray equipment could apply 40,000 sq. ft. in a day with 3 men, when the other contractors could apply 1500 sq. ft with 5 men. So, we could install the same quality of roof, for 33% less money, and still make a lot more profit than the other guys.
Just sayin' that the cheap = poor quality theory doesn't always hold water. Usually, but not always. And I'm confident the same concept would work with car washes, to a lesser degree, but it would be shooting myself in the foot in areas I couldn'tford, to do so.
And, we didn't invent the concept by any means...I think Sam Walton deserves credit for perfecting the concept.