I once encountered a guy online who was passionate about photography (we "met" at a photo site) but he felt like he wanted to do something different, so he got a job as a truck driver. The type of trucks that are really huge, you know? Kind of like the ones which my son calls as the "monster trucks"! Am not so sure if he attended a CDL training, but I do know that he is living his dream right now. He still posts some pictures, and they are just awesome ... specially the sceneries.
I wonder how he's doing right now. It has been ages since I have logged in to my account at that photo site.