Road Racing is VERY expensive and requires a big time commitment, hence why a lot of people don't do it. A track day (especially at mission which is very hard on your brakes) costs you $200 ish for the day, 50% of your brakes and tires

Membership to a club is typical as well, about $25-50 / year.
The ridge in Washington is about $250 USD / day, plus it takes a day to get there, over night hotel costs, fuel, etc.. plan on a single lapping weekend to cost you $6-800 Canadian plus all of the wear and possible breakage on your car.
Not swaying you one way or another as road race prepped cars are my favorite, but its just so darn expensive!