So everyone can afford a car? If you do that's great but not all actors have the means. Your solution needs an initial investment in order to make money, and that's also factoring the other costs like gas and maintenance of the vehicule, so in the end are you making that much more in NET profit? I don't think so. But I heard actors do uber on the side as well, on top of the many other things we do.

Also, I agree, sometimes background will get bumped and it does happen but don't expect it to happen all the time. Congrats on the upgrade! And yes doing BG is definitely frowned upon by agents if you choose it over auditioning. You will have to come with a good reason or excuse as to why you can't go.