Honestly most Americans think more about the coconut in that cake than the handful of pecans that can be left out of the recipe altogether depending on the area of the country that you're in.
From what I can tell, most Americans don't even realize that schnitzel is basically what they/we call "country fried chicken/beef/pork," and assume that wörst in the form of various sausages, and beer are all that German cuisine consist of. Maybe some sort of doughnut as well, named after Berlin.
The water should be coming from the comets or at worst the asteroid belt.
Lifting a city out of a gravity well only to deposit it on Jupiter or Saturn, not only is a waste of resources, it won't work.
Mars isn't a viable terraforming candidate because it has a mass of about 1/3 that of The Earth. No human can live there for any extended period of time.
The problem you have with all of the gas giants is the opposite issue. Once the city achieves boyancy, as everything that falls into a gas giant will, it will be so deep into the gravity well that humans would be crushed.