Dover is up and coming and an easy jaunt from Portsmouth and manchester. Tons of great skiing around a 2 hour drive (I have the Epic pass... Sunapee, Wildcat and Attitash are the ones I'm going to ski a lot at this winter). There are a lot of apartment buildings in Dover, no idea about occupancy or rates (I drive Uber sometimes, and am suprised when I find a new apartment complex in the area.. had no idea).Until recently, I was single and dating (have a GF now), and its' not too hard to date in the seacoast area if you expand searches to Manchester and into MA. I am 50 though, so maybe my dating pool is slightly different. I'm a fisherman and hiker/camper and I love the seacoast as all my fun hobbies can be had reasonably close. But you pay a premium to live in this area.

Around the seacoast... personally, I'd avoid Somersworth and Rochester. You'll .ikely find cheaper rent there, but these are economically disadvantaged areas with the associated crime. Crime is all relative... it is NH afterall.