It's true, the 5 speed jetta tdi is capable of 50mpg. Crazy. And my 2000 dodge cummins is not that expensive to fix. At least not compared to my buddy's powerstroke.
I also own a 2000 a4, and while things can be expensive for it, I have found a great private Audi/vw mechanic who does things dirt cheap somehow. I can't believe how cheap some things have been. I think you get what you pay for and just maintain everything as well as you can.
Walker, Toro, Stihl