1) WHY would you want to try a brand new project when you've got a "supposedly successful" one already going with used car dealers?
2) Why would you NOT want to "share" what you are doing with the car dealers? "Advice"....goes 2 ways;
people who are seeking advice also should consider offering some to others. If you've got a project that earned you a half mill...why not tell others about it?
I've been operating a "FAX" business since 1993 and have "stumbled" across the answers to the questions you raise....and have been selling my "FaxBux" program since 94.
MY reason for starting so many business programs is because I am easily BORED and once something is "in the can"...I'm looking down the road at the next program.