well, keep in mind that it is going to cost you $18,000 minimum to get it from a part 147 school if you can't find an fbo to train you. also keep in mind that despite your experience working on cars, you really won't know anything as an A&P until you gain work experience as one. I have run into many a corporate pilot who has their A&P at my last position and they say most of the time flight departments try to save money by getting a two for one deal with a pilot/mechanic. Yes, it may help you get a position as a corporate pilot but it really is more about who you know.