You shouldn't need much for the car. Pads and fluid. The right pads and fluid can last multiple events without an issue. So say, 500 in pads, 30 in fluid and some time to do that. Very little else will be needed, especially at first. If you can use those pads and fluid for say 3 track days (the rears will likely last for 15 or more) at 300/event that's really only about $500 per event and that's ignoring that the rear pads last longer.Ok, I see where you are coming from and am going to be honest with my response. If you are worried about the $300-$500 track day fee and $1,000 prep then you probably shouldn't be looking at an RS. VIR is a phenomenal track, even the left hand kink headed down the hill before the site the oak tree was...I went off there a few times, and their is no reason that you should not start with a track day at VIR. Just be smart with you $$ and don't overstretch. I see 10 year old WRX's and Miatas passing AMG Mercs because the Merc owner is so timid on track because he/she knows they overspent and is too worried about messing up their car OR they didnt have the money to prep it at all and its overheating/brakes on fire/ tires melting etc.
P.S. The Miatas and WRXs are all like $5k off of craigslist with $1k in parts...an RS is like having 6ish of those - just make sure that's worth it to you and you checking account.
Track days, as everything else in life, are all about risk management. There's always a risk and you have to decide what level of risk you will accept. If it's not writing off the car than you get HPDE insurance. If you can't afford that and can't risk writing off the car, you track something else - or nothing. Or you take that risk. It's a low % chance that you'll get bitten but if it does happen it will suck... and it's likely not just the car.. you'll be paying for damage to the track also which HPDE insurance also covers.