Field fees are really expensive here (like the land) and most places make you use field paint. An autocross is $30. A rallycross is $35. You spend gas to get to either place. If I hadn't gone to Ft. Meade (the afformentioned shock-killing ruts) I would have clocked in around $600 for racing 20 times.
Oh, I suppose. I don't pay a field fee, just air and paint. I only play two, maybe three times a month too. Come to think of it, my pb hobby costs about the same as the upkeep on my dirtbike. For some reason that thing needs a three-hundred dollar bill every year. The price one pays to keep an oldie in tip-top condition, I guess.