True...Florida is looking to make a bit of revenue. But, there is a growing concern with the size/weight of "recreational" vehicles running up and down the highways. At least Florida issued an advisory prior to race week.
It won't be long before the US DOT makes the Class 6, 7, and 8 Toter/Motorhomes with trailers attached fall under commercial vehicle regulations. While the intent may not be for "profit" situations, they're going to start clamping down on the sheer size, weight, air brakes, and what we carry in our rigs (fuel, oil, batteries, etc.). They are, for lack of a better word, semi's with really, really nice sleepers.
The end result will be that racers using those types of haulers will be required to have a Class A CDL with haz mat, air brake, and combination vehicle endorsements...and they'll have to adhere to the hours of service rules...and don't forget commercial vehicle insurance, permits, weights, yada, yada, yada. You might as well buy a Peterbilt (387, 388, or 389) with a 53' hauler...carry 5 cars and split the costs with other racers...and drive your own Class A motorcoach to the races al la sports car racers. This is coming...when? Who knows. Some say 2009 while others think it will take 5-7 years.
Or...we'll see a comeback of the 1-ton dually with a 50' living quarters gooseneck trailer attached. Keep the beast under 26,001 pounds and under 65' in length.