But what you spent on the purchase price of the car was not "cheap". Even used, these cars are pricier than many others. You can buy a used Civic for thousands less, and still snap off 38+ MPG with ease using cheap RUG and never have to worry about a DMF, an EGR cooler, etc. and it won't care what oil you use and a genuine Honda oil filter is only 6 bucks. Yes, it is a crackerbox, but it IS cheap!
This is where TDI ownership gets interesting. The one single question that makes the most sense is, would you buy the same car with the gas engine? If your answer is no, then the TDI is probably not suited for you for the long run. Because the love affair with good fuel economy will soon be trumped by the general needs of a German car.
Now if you WOULD buy the same car with the gas engine, then you will probably be happy. Because you obviously see something more in the car. The looks, the ride, the build quality, the handling, whatever. But just buying one "to save money" is bogus, because the numbers simply don't add up.