Follow the dream!
Bruno,
Don't give up - anything worth achieving is worth struggling for.
Yes, it costs money. Yes, it takes time and effort. Yes, there are going to be times when you say "phooey, I'm going to take up surfing!"
Stick with it - it is worth it 10,000 times over.
You say you have saved 12,000 Euros and don't think that's enough - for a PPL (which is the first, biggest and most vital step) it definitely is. There are any number of flight schools, domestic and overseas, where you can get the PPL for way less than that.
As GusHoneybun said (more or less) once the aviation bug bites, you're in it for life. Personally, I consider aviation a disease for which I hope there is no cure.
Most important is this - ask yourself if some day, far in the future when you are an old, old man, do you want to say to yourself "I wish I had gotten my pilot's license back when I still could."? Go out there and do it - whatever it takes it is worth it.
Best Regards,
EchoMike (PPL since 1979)