How much you shouls earn to own a BMW

Hey folks, how much you should earn in Europe , probably Poland, as I'm from Poland, to own a new BMW, for sure I need to take a loan, but is it worth it? Or I'll end up with continuously servicing my BMW, spending a lot of money for new tires etc. And I won't have money to go out? I've previously owned a used 2009 Audi A4 B8 Avant, and was pretty much happy with it, except insurance around 1k$ per year, and expensive tires - r18. Wouls be nice to hear some advices from guys who own 1 or 3 series .