Have you checked with R2 Racing about a 944 for sale, they may have one. Tim Comeau is a top notch race car builder and could have something to buy. If you rented from him you would not be disappointed. I use 7's Only for car prep, modifications, track support and transport. They are very honest hard working people with lots of race craft knowledge. I do not think they have a car for sale, however they have contacts that could help you find a race ready car.. Their number is 661.764.5456, ask for Bette or Tom. You can use my name Tom Atteberry.
There are between 3 and 5 of us who will qualify within one second of each other at every event. The result is some very tight racing between that group. Charlie is right the one who makes the most driver errors or has the less than optimum car set up ends up short. That said after the race everyone sits down and compares race videos and car set up. Our whole idea is to get everyone up to equal race craft so we all have a group to race with each event.
As Jim said there are three new racers joining us. The group has a good reputation at NASA as a group of friendly gentleman racers.
Charlie was right to get to the front the all in car cost will be around $20k with the original car cost being $10-$14k. I would think with a little work you should be able to find a race car before the season starts.
You can look at the class rules and see that we have limited regulations. The cars are kept pretty much stock. We try to control costs, through the class rules, have all the cars very similar in performance so the result is the driver is the key component of successful racing. Everyone one of us is not interested in seeing who has the biggest wallet.
Good luck finding a car and we would love to have you join the group.
As an aside you will appreciate the added room in a 944 cockpit. I am 6'3'" and appreciate the space.