Ah bugger, where do I get into these things!
My car handled the track work perfectly for five hours. I was only feeling hints of brake fade at the end of the laps, because it was given plenty of time to cool off between groups. I didn't do anything to it beyond normal servicing and maintenance before or after. I have no interest in pushing the car and my boundaries, because its my DD and I don't want to have to be slugged with all those costs you're mentioning. I'm specifically NOT interested in the expensive and timed BMW track days for this very reason.
The extra $100 really does make a difference at my level.