Hi Walter
I understand your concerns, However as you know, Bills come hand in hand with being a car owner, it doesn't matter what badge is on the car. I believe parts are generally quite reasonable, you're level of DIY skills or lack of, is where costs could be reduced, if you can't do the work then unfortunately you have to pay someone to do it for you.
The guys have mentioned finding a good Indy mechanic, totally agree, I used a main dealer straight after I bought her for peace of mind, with a health check, and some work that required immediate attention, I wanted some other bits doing and the main dealer quoted numbers that made my eyes water, it was finding this forum that opened my eyes to other options and ultimately cost savings.
Also I would imagine you would find a similar range of problems being discussed on other forums of other brands of car, so don't be overly concerned about the Jaguar brand.
I'm a newbie to Jaguar ownership, and have already paid out money on her, but as the advert says 'She's worth it' I've got her to a place now where I'm happy, it's just about keeping her there, as the guy's say.
it's a pleasure to look at her, admire her, and an honour to own and drive a Marque, not just any Marque, it's a Jaguar!
Best Regards
Steve