R300 / R400 cost/trackday

[willr]

What's a good ballpark estimate of cost per trackday to run an R300 or 400, with CR500 or similar tyres?
Assuming the car isn't driven to the track (no insurance, road mileage, etc).

[willr]

Apart from tyres, what are the "wear and tear" items that would normally need replacing after x trackdays?
What about brake pads & discs, clutch, cables, linkages, suspension parts, etc?

[willr]

Thanks for the replies so far.

I was interested in the costs/trackday (fuel, wear and tear, etc), excluding depreciation. To include depreciation would mean an assumption about the number of trackdays/year, which is very variable. Otherwise, I guess the annual "servicing" cost of the car is minimal.

As for depreciation, how realistic are the advertised resale prices on pistonheads, caterham.co.uk, etc?