I always thought trackdays wasn't about racing
Jeff if it's becoming more difficult to keep up why not take on the challenge of further developing your car and driving skills.
Would be a much cheaper and less frustrating option than racing
Personally I'd get a lot of pleasure from trying to hang off the back of a 991 or making myself difficult to pass driving what appears to be a much less capable car
I chose a long time ago only to be paid to get my racing/competitive fix as I know I'd only end up broke, divorced and at the back of the grid if my own money was used.