Barring any problems, oil changes will often run about $100 (the car uses
almost a case of oil), and I suggest you let a mechanic do it so you can
catch any problems with the car early.  Jiffy Lubes, etc., tend not to use
the correct filters and don't really know what to look for when they are
under the car.  Tune-ups can vary a lot, anywhere from $600 to $1000.  Also,
if you drive it hard expect to go through tires quickly, especially the rear
tires by about 2 to 1.

Just make sure to have anything you buy inspected by a good Porsche mechanic
before the sale.  This expense can save you a lot of money down the road.
Labor is on par with any marque, but Porsche part prices can be outrageous.

BTW, if you join PCA, and there's a track nearby, it's too tempting not to
take the car on the track. :-)  No speed limits. lol