Great question! Was wondering the same. Similar situation here, was debating on the 1 day M school and also have an '05
To add to it, say if you are a beginner (which I am, never tracked my car) would I really need a new set of pads after my first event? In my case I would be racing on the VIR.
I imagine first time around I would be driving rather slow-er. Don't even want to think about the rotors, ZCP here and that would be over a grand for all 4.