Well.... I work for a car parts retailer (Mazdaspeed6 and Plymouth Sport Satellite above). And I deliver parts for them (=time on the road, see C2 and Caddy above.) And I have no life outside of part time work and carspotting, so I'm out cruising given decent weather (or not even, if I have ants in my pants) and gas in the tank (I budget for about $80/week = 35-40 gallons = 700-800 miles.) I put 170 miles on my car on Friday, for example. And while some of the cruising is just cruising/exploring, a lot of it is hitting the hot spots to see if there's anything new. And I spread out my uploads, limited to 10 or sometimes 15 per day, so it's not like I'm seeing stuff every day. I got 17 keepers on Friday, but only 1 today, for example.
What I'm saying is, I don't think I live in a great area for carspotting, rather I am an absolute carspotting freak. If you really wanted to go to the lengths that I go to, I'm sure you could spot the same or better than me. But if instead you want to have a more normal life and just do carspotting on the side, well, I think you're doing pretty good!