I enter drift meets every month here in WA.
It costs me about $25 each day. (because i am a member of the club)
On the average day I would go thru 4 tyres.
I use crappy s/hand 16s on my stock rims.
My car handles the day really well, regualar servicing and checks make a huge difference.
Total track time would be around 1hr. (thats actually drifting)
The track day here starts at 11 and would finish between 4 and 5 with as many runs as u can handle.
Coming off isnt too bad, as long as there is nothing to hit. I was unlucky enough to hit a small lump of dirt that destroyed my front bar. But thats drift for ya!