My track day costs are something like this. I can get 3 or 4 days of a set of kumhos at about 900 a set.
Brakes cost about 300-350 for a set of front and rear pads. Rears last a season, fronts may last 2 weekends at CMP.
25 to 30 gallons at 3 buck a gallon let call it 100
Oil and brake fluid 40 bucks
Add entry fees and traveling expenses and depending on the place it can be Big money. If the wife goes, cost tripple.
It is easily a 600 or 700 dollar weekend If nothing breaks.