To be fair a lot of these homes have been there for 50-100 years (some way older). Salisbury (and parts of Hampton just north) is relatively poor compared to much of the New England sea coast, but those look like pretty expensive homes. Just a road or 2 over is a lot lower income. lots of fishermen lived there traditionally. That part of the Atlantic coast was settled and built before the idea of public land was really well defined unlike parts of California and the west coast.