Yes, as others have already stated, a dealer is pretty much useless to a (now) 17+ year old car. I'm guessing Porsche of Rockville is 50 miles? You will definitely want to keep driving...lol
No, seriously, IMA is good with these front engine, water cooled machines and that's IF you need heavy maintenance and Charlie Murphy at Intersport in Tyson's knows the front engine stuff very well too. Many day to day things can be DIY even though there's a fancy badge on the hood.
Check out some of the other threads on here about operating costs. The cheaper the car, the more it will cost you because of previous owners' deferred maintenance. There is a saying...."buy the best one you can afford".....and don't be afraid to wait for one to come along. I'm not too far away, so if I can help, please give a yell. Coupe? Car? Tip? Stick?