Check out the replacement cost of the engine – close to $31K. Everything that needs replacing on the 911 is going to be costly. In addition, because weight is of concern all parts are manufactured of light weight material; are sized to only handle the designed load; and will not tolerate ham handed mechanic technique. Thus, using a Porsche specialist is a wish choice.
On the other hand, I bet you would be paying a bundle to purchase this car, even though it is 11 years old. So you shouldn’t be bothered by the high cost of parts and labor to keep it up.
But, when you get out on Highway 1 between San Francisco and the Russian River, you will appreciate what a nice sports car the Porsche 911 Carrera Coupe is. Go for it – its only money which may well be worthless tomorrow.