For what it might be worth, we have a pair of Jetta Mk4 TDIs one with the ALH engine, the other with a BEW. Both are well over 200,000 miles (the ALH is pushing 300,000) and for the most part we do our own maintenance, using a local shop for thorny diagnostic issues and when specialized tools or a lift are required.
Over about 200,000 miles the ALH has run just over $0.10/mile (0.1028), that includes three timing belts, brakes, a drive shaft, struts – the usual stuff you might expect over 200,000 miles. It's worth noting that brakes have lasted over 100,000 miles, tires (Michelin) has lasted 80,000 miles, the exhaust system is still going strong, we're still on the original turbo, injectors, and injection pump (although I'm working on smoking issues right now).
We've only had the BEW for about 50,000 miles and it is running only $0.0208/mile (with basically no major work beyond normal maintenance items).
Both cars get serviced according to the factory schedule using OEM parts and good synthetic oil. The costs feel very reasonable to me and the durability of the cars makes me think that we've saved quite a bit over the cost of getting new (or new to us) cars over the years.