I have not done this yet, but I have track experience and have rented track time up here in Ohio.
If you are treating your husband, I still don't know what DH means... haha, I would say it would be neat if that is what he is into.
The prices are very high for what you get, but I guess the cars are pretty exotic. The cheapest one though honestly is kind of lame. You could go rent a car from Hertz for the day cheaper than that and it would outperform it. Just my thoughts, if somebody was buying it for me I wouldn't turn it down though!