I think CJ was looking into this last year as a possibility.
Maybe something to look at for next years rimg trip, it is expensive to a degree, our long weekend costs about £600.00 per car, thats room, food and beer at the hotel, ferry etc. But we do have to buy laps and battle with shed loads of other cars and bikes.
I think it's worth £500.00 for sure as a driver, but would you pay £500.00 to be a passenger? I wouldn't