An idea which just came to my mind ?

Imagine a busy town with busy people with busy road. What is i have a car wash beside a petrol pump which washes your car in 40 seconds. Car enters the car wash from one side. Close the windows , roll the glass windows up, sit tight. The car moves on conveyor belt and goes through series of stages of cleaning and comes out clean and polished in 30 to 40 seconds. Do you think this business will work in a city like mumbai where people dont have time to clean their cars but they want their cars clean. I think it should work but the only hiccup is the machine which can clean the car in mere 40 sec. possible ?