John -
These cars are really quite simple to work on so long as you don't have to go inside the engine or transaxle.
All of the wiring is exposed and easy to get to, usually the engine is in the open and unencumbered with all the computer geehaws and crap on modern cars, and although there can be minor variations that may trip one up, a good manual like the Bently VW Service Manual will take you a long way.
Everything on these cars is fairly simple and logical and as was mentioned above, people here are always quick to assist...I leaned on Larry, Mike and George a lot during my first months of ownership.
Additionally, unless you plan to drive your car a lot, components like brake shoes and pads shouldn't be an issue for years.
If you take a look at the cars on the market, the majority have only a few thousand miles on them, with most having less than 3,000. Compared to the typical family sedan, most aren't driven that much. Given that, the big service issues seem to be changing the oil regularly, valve adjustment, fan belt tension, carb adjustment, clutch adjustment and timing (Not particularly in that order).
Because the cars are "handmade" and build quality varies signifiacntly from car to car, there are always "issues" to be dealt with, but for the most part, that is usually part of the "joy of ownership" (As long as the "issues" don't rear their head while you're on the road).
I had some significant issues with my car at the beginning and fortunately for me, the constructor paid Jake Raby to correct them. Since that time, it's been minor stuff and quite frankly, I'd rather be fiddling with my car than doing just about anything else that's legal (Notice I said, "just about").
Bottom line: The cars are a blast if you don't let yourself get too tied up in the "experience." Like any other hobby/pasttime, it is possible to take this all way too seriously and then the fun seems to diminish.
Just my opinion...
TMc