That is $185 for a single. Right? $350 for a single national seems to be about par for most of the tracks that I know of in the SEDiv.
No question that CFR gets a bargain on track rental at Daytona and Sebring, but that doesn't extend to VIR, Road Atlanta, Barber, Roebling and so on.
I wish it did. I would seriously think about running a national class. At $700 just for entry, I have to pass myself.