Would you pay to have your business advertised on some one elses car via billboard bolted to roof of car?

My car is a 1990 blue Camery with some chiped paint here and there. My car is drove through town a lot and when its at my office it would be seen by 100's of people. If so how much would you pay. Would you pay by month week etc. Thanks for taking your time to fill out the survey. (You the customer must have your own vinyl to put on the billboard on your own i would just drive it around.)

Would you pay to have your business advertised on some one elses car via billboard bolted to roof of car?
My biggest concern would be where is my "billboard" going to be seen? Is the car's driver a good one. If you pull out in front of people or tailgate or something, you'd give me a bad name. Based on what you've said, I'd be willing to pay about $100/month, but on a trial, month-to-month basis.
Reply:It's already being done...they are called taxicabs.
Reply:nice thought but a bit weird