I'm actually going to do something like this starting around Sept or Oct this year. I wont be in any one place for a entire year, but I'll be traveling around the country until I get bored.
I'm setting up a Quigley 4x4 van that will be a class B RV. I'm putting solar and the whole 9 yards on it, so it will be self contained and go just about anywhere. Meaning I wont be limiting myself to just cities.
As far as living abroad.. I don't think I could limit myself to just one city. However I wouldn't mind traveling around Europe and even Eastern Europe for a year..