[Christien]

I think it's an awesome idea, if you don't mind driving a $15K 911 into the ground. And I don't mean that sarcastically. Another option might be a 1st gen boxster - similar price range, but better heat, heated seats, traction control, airbags, less rust issues, etc. But I hear what you're saying about a familiar engine to work on, rather than paying to get things fixed.

edit: if I had $15K to put towards a 2ndary fun winter car, it'd be a boxster.