I have been coming up with different ideas for start-ups over the last year or so. I don't have a lot of money so I was thinking to kick things off, I would start a mobile advertising business. Ive got a few things worked out, but want some outside feedback. It would be removable (magnets) ads placed on cars. Companies would pay to have their ad on a car for a month at a time, and people would rent out their vehicle space. The vehicle owners would get a percentage of what the company pays. Think it has potential? ANY feedback would be awesome, thanks.