Here's how I do service....
I roll into the dealership - I ONLY have my stuff serviced at the selling dealer -
I give tell them a list of everything I want serviced. They always reply - but that's not due yet until "X" miles. I politely smile and tell them - Here's the list of things I want done... It always takes two times for them to get it.
I don't care if it's not "due" yet - I want it done. I also tell them - If there is ANYTHING the tech sees that needs service or changing or is going to need changing shortly... FIX IT NOW.... Don't call me until the car is done.
If you can afford to drive this kind of crap - then the last thing you should be concerned with is what piddly crap costs. I just drove into the shop with a $170K car - do I care that an oil change costs $200? No. Do I care if it needs brakes - NO - just fix it.
These cars are made to DRIVE THE SNOT OUT OF -- that's how mine get driven - that requires service and parts and they're expensive. Ya gotta know that going in. A Porsche or similar is expensive to own - everybody knows that... A Ferrari is 10 times that cost and way more frequent!
To me - it's like owning a boat and then complaining about fuel costs.... REALLY? Then sell the f'n' boat and stay on shore...