"The personally freedom and the eternally summer create a lifestyle, which makes working very easily. Thereby it is by no means that people work not as hard as anywhere else in the United States. Far from it! But this strict separation between work and space time, as it is usual at the east coast or in Europe, does not exist there. "
The first part should be "The personal freedom" and "the eternal summer".
Also in "Frankfurt will play its role as Germans most important Finance Place furthermore." I would personally write it as:
"Frankfurt will continue to play its role as Germans financial centre".
"However, it is just one part – and fortunately stills the small one – of the social reality of the city.
I would write this as:
"However, it is just one part - and fortunately, still a minor part of the social reality of the city."
Otherwise, pretty good.