I do get a chuckle about the featured home. I know that area and the Shelter Institute. It originally started as a method of building a low cost home on lots that were cheap because in some cases they were economically unbuildable at the time. They didnt believe in conventional foundations, they advocated building on wooden posts and despite their arguments to the contrary the posts did not last as long as many expected and frost heaving was an issue. With the house up off the ground keeping pipes from freezing was a challenge. That area of seacoast tends to have marine clay soils with a very shallow water table. That is probably why there are ponds on the lot. If you notice the interior shots with the walls covered with rough swan wood, the reason is that many of the homes moved so much due to frost issues that conventional dry wall would crack. There rarely is city sewer and building a septic system is an expensive challenge in high groundwater areas. The state did not regulate and inspect the installation of these systems very well and given the age of the home, my guess is that the new owners will be looking at an expensive replacement in year or two. Sure there may be shallow ground water but frequently its not great and requires treatment. Drilled wells into the underlying granite will usually provide good quality but its almost a guarantee that a radon mitigation system has to be installed on the water supply.
I am seeing a Covid housing boom in Gorham, In my development there have been vacant lots for sale since I built my house 30 years ago. There have been people with out of state plates roaming the neighborhood looking at the lots and in the last 2 months 3 lots have been sold and two houses are racing to do site work and one just got a foundation in while a third looks to be getting ready for construction next summer. Down in the river valley in Berlin and Gorham, cheap homes are being snapped up by folks from Mass so they can come up for weekends to go out on their ATV with the plan to retire up here in the future.
There are lots and places like Brian are looking at but there does have to be some flexibility on the buyers side or an unlimited checkbook and the buyer needs to be educated and be realistic. The realtors around here may look like "country hicks" to out of town buyers but most know how to market to out of staters. Despite a written warning to the contrary when dealing with a realtor its only natural for a potential buyer to rely on the brokers word about the area and the property. The realtors work for the sellers and are very good at not disclosing the downsides, so its caveat emptor. Owners supply a property disclosure that buyers think is protection against surprises but the reality is its pretty rare that a failure to disclose can lead to recourse against the prior owner. In a hot market most sales are as is where is so the buyer owns the defects anyhow.
The reality is that the remoteness you are looking for comes with some significant downsides, many camp roads around remote ponds and lakes are not plowed or maintained. Its frequently up to a "voluntary association" and rarely does everyone pay their fair share. Most are seasonal owners so the are not going to be interested in plowing the roads or making it passable during mud season. Unless someone is lucky shopping options are limited. Along and north of RT2 Walmart is normally the only grocery store (or Dollar General) and they tend to stock what sells to the locals. I need to travel a minimum of 40 minutes to access a slightly higher end food store. If there is a fire department its volunteer and mostly exist to put the coals out after the structure has burned to the ground. No local police, camp break ins are frequent off season and in some rural areas the locals are still breaking into homes and camps and stripping the copper out of them. No Ambulance, if you get hurt hopefully there is someone around to get you in the car and haul you to the hospital an hour away. No trash pick up, you either pay a local contractor to pick it up or you go to the local transfer station that is only open limited hours so there goes Saturday morning.