Not to scare anyone... but here's the cost of my next event at Daytona. 5hr 40min of scheduled track time. I dislike opening up this spreadsheet before and after each event because you wonder what you could have used all that money for... but then you start thinking about the fun that was had and it's all worth it.
On the argument of more track time vs. cost, here's a comparison with my Roebling Road event and 6hrs of schedule track time.
There are lots of variables that make the cost vary. Now I know you guys aren't towing, etc... simply showing that there is no definite rule on the expense. A specific group may have the environment you chose to be in, and that's who you go with regardless of track time or cost. And sometimes you just pick the most cost effective option.