I've got a coastal town in the book I'm writing that was founded by settlers in the 1800's. Later on in the 30's, 40's and 50's it started to become more of a holiday town and a place for retirees to come and live. The sentence I have is:
Well built white houses mingled with the rustic log cabins, constructions of the ${word} of ${town} rather than the settlers of ${town}.
So basically I'm looking for a word that describes an influx of people, who aren't migrants or "new money", that come to live at a place later after it's original purpose has changed.