Ok, so you had 1 subcontractor (yourself). I don't know Cherry's deal, but doesn't seem unreasonable to say that they were shooting for a 1,000. Or 10,000. In geographically dispersed areas. You can see how it can start adding up.
I never said I was the only one washing cars. I had sub-contractors that I paid on a per-car basis. Scaling an on-site car wash to 1,000 or 10,000 sub contractors is not going to happen. And here is why: Too many problems will arise. Insurance claims, theft, etc. will quickly make them raise the price to keep a healthy profit margin. Problem is, once you pass a certain price point, people will simply not buy. Thus you end up scaling for nothing. On site car washing is one of those businesses that just doesn't scale favorably.