I've not even been around here for a year, and saw plenty of that question like yours. The discussion didn't end with an actual advice about what kind of job you should take to be able to own a Ferrari, just with the advices you've already seen in this thread.
But I could tell some things how it goes to plan something...
When I was in my last year of primary school and was at the point to choose the next school which may thoroughly decides how my future life would take its way, I knew (as a petrolhead already) that I want to work with cars or whatever mechanical things while still having the possibility to afford a Ferrari after years of working hard to achieve it. So I ticked the best bilingual technical highschool in my city with mechanical engineer course. I got there and things started to escalate quickly in studies. Now I got two years ahead of me with the technician training year included. The next step is a technical university to continue the engineering profession (5 years) for the ME degree.
After that, going to the Audi factory here in Hungary to apprenticeship, then a real job there. I wouldn't go further as anything can happen but the main goal is to get abroad to wherever is possible in the car industry. I know a fellow countryman who got through that whole thing I wrote down and now works in Stuttgart at Mercedes. Salary per MONTH is around €6-7k. But even less is far enough to get there what you want after years of working at a place where you love to work and stay.
So that's my main goal or something like this to be exact. I've been planning this crap for years now and it now turns out that I'm actually good at it. I have the passion, patience and the will to be able to achieve my goals. So you should figure out something as well, find something where you feel happy and good at it, work hard and you get there before you know it.
Also, the future is always on the move you can never know what and how will turn out in your lifetime. But don't expect to get your first luxury car at your mid twenties.
Remember that not a Ferrari should be your goal of your life or everything can be screwed.
Hope it helps somehow.
[EDIT: English and a second foreign language such as German or Italian (or both
) is a great plus which is important part of this whole crap I was talkin' about.]