Not sure I understand your question - but it looks like maybe you hit the send button a little too soon.
You'll probably find that europe is overall less "commercial" than the US, though it can depend a bit on how you mean "commercial." Paris and Rome are both big cities, with all the pluses and minuses of big cities around the world (think: New York). Portugal is probably less "commercial" than Paris or Rome.
But in any event, you would need the local language to live in any of the three areas you've mentioned. And a visa, which usually means a job unless you're retired and have a pension that will convince the consulate that you can live in their country without tapping into the local benefits system.