I'm inclined to agree that the FAA system is fairly straightforward and although the path to the right-hand seat of a Boeing or Airbus is likely to take longer in the U.S. than Europe at the moment, and that it will likely necessitate an increased exposure to the risk of flying general aviation type aircraft for longer, it is a worthwhile, rewarding and potentially more lucrative journey in the long term.
The biggest issue I would consider would be where do you want to be geographically. You list Wisconsin as your location on here with both U.S. and German citizenship, which is a nice situation however have you spent any time in Germany or Europe in general? Life is quite different than in the U.S. (in both directions) and it would be a pity to invest heavily and relocate to discover that the lifestyle, climate and people didn't suit you.