If you can afford a Porche I am pretty sure you can affored the up-keep
I now do not care about the car........is that really you in your profile?!?!
I wouldn't get it unless you want everyone to think your a stuck up dumb bitch.
To answer your question, maintaining a car like that will cost a lot more than an american or japanese car. Most newer porsches, bmws, mercedes etc are designed so that the average joe mechanic can't change the oil or perform other basic maintenance. They design them in ways so that you have to bring them to a porsche dealer or to a specialized european auto shop so then they can charge more because you can only take it to them.