My car owes me £1500 at this point and will be over £2K once it's caged in the Autumn (this is includes mods and wear and tear replacements). Trackdays aren't expensive (approx £150) but when you factor in fuel, tyres, brakes and other consumables it creeps up. I put in £80 worth of fuel when I did silverstone and fuel prices were a fair bit less in sept last year.
Nick