I'm going to go against the majority here and say that you might be a lot better living somewhere like Baden-Württemberg rather than France, seeing you already speak German. Some things in Germany are more expensive than in France, but many are absolutely not.
If you live near the border you can make the best of both, eg somewhere like Offenburg. Or conversely live in a village like Rhinau or Neuf Breisach on the French side of the Rhine where people also speak German and you will at least be able to communicate.
My parents live in Germany, I was a student there, and I genuinely believe bureaucracy is simpler in Germany than it is in France. I can completely understand a person thinking France might be less of a hassle but especially if you are foreign and you speak no French, it really isn't.
French official correspondence isn't any simpler than the German equivalent and there is just as much if not more red tape.
Oh and bear in mind that your acquiring German nationality is a result of living there for ages and being integrated as a German among Germans, and may not go through if you decide to live in France instead. I was adopted by my step-father, who is German so I legally bear a German name, speak German, lived in Germany, was educated in Germany but if I don't live in Germany I won't obtain German nationality (and why should I if I choose to live elsewhere and already have another nationality or nationalities?)