tbh, Maine is more separated between "Wealthy tourists who live here during the summer or weekends" and "Native middle class/lower class Mainers".

Mainers who become rich tend to move somewhere else and only spend summers here. Not because they don't like living here but because that's just what rich people do.

If you are talking about the difference between lower class and middle class, In small towns there isn't really a separation (at least in my area I think). In my town you can drive down the road and see a middle-class, well-kept, quaint home. Then literally the next house over is a trailer with a confederate flag and broken car in the lawn.