let me break it down for you, this is what me and brother do, its up to you how or what to cut to save you money, some may or may not apply to you.
Event entrance fee: $115 to $130 (depending who you choose to go & event venue)
Used Tires: $35 to $45 each x 6 (depending on what brand of tires you can get and size) usually warrior tires or some china made tires.
Auto transporter: U-haul $54.95 x 2 days (pick it up a day before the event)
here is whats the rate right now
getting ready for the event: higher grade oil $13~ x 6(just incase)
radiator fluid $25~
gear oil (tranny and rear diff) $34~
brake & power steering fluid $12~
Misc. stuff incase you pop or burst something on the track like extra power steering belt, fan belt (if you dont have an electric), radiator hoses, clamps & ect $100~
hotel or motel: $55~ a night
food: if your going on willow springs raceway near the entrance or outside they have tacobell or jack in a crack next to ralph's $20 2 person
petrol: the suv or truck thats pulling your car $200, if your not using a racing fuel $80
so lets total it all from the highest amount: $1,115~ but its hella fun