I would follow my passion and work really hard at a job that I love. However, do realize that probably only 1 in 20 trainee dealers make it into a permanent job. You either have it or you don't. So you have to take a risk. Make sure you save some money first and be prepared for some lean times. If you are one of those 19 who don't make it, then go back to your old boring job. At least you know you tried.