I'm looking at that as well; in case anyone is interested, as of today, here are the prices (YCRS):If you do CSS or YCRS you can just do the 2 day school and use their bike (and gear if you want too). IMHO, that's the easiest way to try it out without going all in and you will get top quality instruction to boot. It's been a looong time since I did it, but when I did CSS the deductible if you binned one of their S1000RRs was ridiculously low so crashing wasn't even a worry (other than pain and suffering, etc.).
2 day school - 2995
Bike rental - 700
Damage Waiver - 200
Safety Gear (helmet, leathers, back protector, gloves) - 180
Right around 4K for the weekend, renting pretty much everything you need. If you bin the bike and have the damage waiver, you'll be liable for 3,500 of it (basically a 3,500 dollar deductible).
So, best case, you're at 4K for the weekend, worst case, almost 8K. Which is why I set my budget for a bike around that 8K number, if I bin it the first time I'm on track, it would be around the same as the "rent everything and wreck it" with YCRS. If I don't bin it but decide I really don't like track riding, sell the bike, probably a <2K education. The airbag I'll use for all my street riding going forward, so that's not really a "track cost". The big gear prices to buy outright are the leathers (which I think I'd use in certain situations for normal riding, the Tail of the Dragon, for example, if I had leathers I would have worn them there) and the helmet (because my existing helmet it modular, I need a new one), but again, I'd use that helmet in other situations when I wanted the highest level of protection possible (or just to give my poor Sportmodular a break!).
Either way you go, it's a very expensive weekend. If you can "dual purpose" items from track on the street, IMHO, it leans more towards "buy it" than "rent it".
My longer term plan, if I enjoy track riding, is to eventually sign up for a school to improve (likely YCRS because they run on my local tracks with some regularity).
The big hurdle for me is mental, I'm not sure I'll enjoy it. I'm worried I'll be too nervous/scared to enjoy it. So I'm trying to find a relatively cheap way to try it without committing; in reality, if I do it once and don't enjoy it, I'd probably keep the 2nd bike as something different to ride from time to time (the XR is great for longer trips, but, it's a bit much for around town riding!) and use most of the stuff I'm looking to buy as backups or for specific types of riding. So I'd only really be "out" for the cost of a day/few days on the track, 100's instead of 1000's.