Lovely car to drive. But those who know Porsches will always think to themselves "Couldn't afford a 911".
Ignore them.
However, do your research thoroughly and get any potential purchase inspected. Porsches can make you bleed money...

There is an easy solution to that - but not the cheapest solution:
Budget for a Porsche warranty or good aftermarket warranty, and get used to it being an additional yearly cost...approx £1000-1200...and if if breaks, it gets fixed, and you get something nice to run about it whilst the car is fixed.
The other piece of advice would be to drive it daily.
The majority of the 'issues' I suffered were added to by it sitting for long periods, letting the seals dry out etc.
The guys I know that drive Boxsters daily have NO issues...servicing isn't bad, tyre were is superb, as it break wear, and they don't wear suspension bushes out like VWs do!!
In 3 1/2 years and 13000 miles my S3 used 3 sets of tyres, 3 sets of brakes (including some LCR Brembos), wore out 3 suspension bushes and averaged 22 MPG.
My 911 used 2 rear tyres, used one set of brakes and averaged 19 MPG.
Porsches expensive to run?
Not really...the services cost more, but they wear out less 'stuff'.