only one thing to say....... your work needs to be done to a standard not a price or a time frame. I don't ever give my customer's a time frame when it's to be done, unless they have limited transportation and need it back in one day. at my shop we are generally working on up to 4 cars per day, and I do not generally like to have too many guest's over night in the cartoys hilton, unless they are on the 3-4 day project program.
My original question about the Express Detail that is always brought up in the trade publication "Carwashing" ragg, hey are always mentioning adding Express detail for Tunnel carwashes. Unless you have a team of 4-5 guys, then and only then and only then can you pump out a vehicle in 30 mins.
Mr. Ford man......................,like I said earlier it takes a good 15 mins. to prep the car, and get all of the loose material before you wash it. we spend 2- 5 mins per wheel getting all of the grime and brake dust off.
Now on another note , if you keep your car impeccable washed once a week,etc. then you could in theory do it in 30 mins, but it would still be a half baked job.