Well, I would say that go back to desk and start studying! You can keep flying those sightseeing trips beside. Believe me, it will be easier to do your JAA licence now than later. Looks like you are happy for your flying skills, keep that up but to get a real job in aviation you need a licence. Sooner or later you will be back in Europe and you canīt get anything decent without JAA licence.
Jobs with N reg airplanes in Europe are more or less temporary for the simple fact that they are all private planes and those kind of operations do not have such a steady future. Hours will come later, I can guarantee. I used to fly over 150 hrs per month when young and fit in Africa year years ago... Now 20 hours makes me tired...
Nikolai