Wanted to buy a used porsche, now afraid

[posabsolute]

Hey guys,

So i'm 30 got a house & currently saving money to buy a second car (a sport car for me that is)

My budget is 18k maximum, looking into 350z & all I was surprised to see some 2002 boxster with under 50,000 miles for about 15k. You know, having a porsche would be kind of awesome.

So I started to do my due diligence & it seems that a lot of thing can go wrong & that's going to cost me a lot of money. Let's say that I want to have that car for 5 years & do not want to put more than 5k into it, is that realistic or I better look elsewhere?

PS: That would be a weekend & night out car, I will not go to work with it which should put my milage in the 6k & less miles