Building land in the middle of nowhere with the house prices?!

But the question I ask myself is: How does the house price develop on cheap land? What I want to say is: how stable in value does the house remain if the location is poor?

The property value in rural areas develops according to the municipality, essentially depending on two factors: demographically weighted population and employment rate. By the way, I recently heard that the current translation of "JWD" is "everyone wants to go there."

So a expensive house actually makes little sense. But at the moment, you already pay around 350,000 euros for 130 sqm (pure construction costs)

Detach yourself from your obvious delusion that construction costs are sunk costs when you place a house on a not high-priced plot. Even in rural areas, there is an increase in value if the local attractiveness rises. I see a trend on the macro scale that the importance of work/life balance for the quality of life experience is rising more strongly than the home office quota. What would bother me about your Posemuckel (backwater) would therefore not be absolute profile features of the place, but rather the fact of the time lost commuting to work. If this also applies to many other potential new residents of Posemuckel, then only very few will settle there (and your concern about a falling land reference value may then be confirmed). I currently have offers where a 142 sqm semi-detached house KfW40 with plots from 228 to 524 sqm is supposed to cost between 370 and 470k (the second construction phase of the Hildmann dream houses in Neuwied-Block, see / as a triple row there is the model as in the first Blocker construction phase also in Schwaigern: ). Neuwied is a district town with just under 70,000 inhabitants with all types of schools including several special schools; one commutes 20 km in 50 minutes by car to the former district government capital Koblenz with university and Bundeswehr locations, 40 minutes to the factory outlets location at ICE station Montabaur, about 70 minutes to the federal city Bonn with university. There is the EHC "the Bears," a zoo, an annual dike town festival and a "Currywurst Festival" as well as currently, of course, the Pentecost fair on a festival ground, where every few years a traveling circus occasionally shows up. And in the "city," sidewalks are folded up with gastronomy closed even shortly after 9 pm on weekends. There is Lohmann Rauscher and one of the two Rasselsteins, but no Cargolifter or Tesla far and wide; for that, it is not remote enough again. You will find numerous threads nationwide spread with similar offers from Traumhaus / Brale / Wengerter / Werner / Weisenburger / Tecklenburg and others as well as (then as WEG) Deutsche Reihenhaus. All as said for the target group young families with two kids, only the parents are often around 30 years old.

I don't want to talk him out of it. But you should think carefully about it. Because just because "I" like it and it worked for "me," doesn't mean it will work for everyone else.

Especially if he's already wondering whether he'll be able to sell his place again. That's the surest sign that he's not convinced and should quit. That's basically the prenuptial agreement. Yes, I do... BUT...

Regarding the advice to get involved in the village community: When do you want to do that? If you regularly spend 2x2 hours commuting, Monday to Friday is gone. Home office can help, but who knows what the future will look like and whether you will always be able to be at home on the days needed for the club or the fire department. Saturday is not possible, you have to shop and finish building your house. Sunday you continue building...

And children also want something from the parents occasionally...

Regarding the advice to get involved in the village community: When do you want to do that? If you regularly spend 2x2 hours commuting, Monday to Friday is gone. Home office can help, but who knows what the future will look like and whether you can always be at home on the days needed for the club or the fire brigade. Saturday doesn’t work, you have to go shopping and finish building your house. Sunday you continue building...

In that case, there isn’t much room for personal contribution. But that already results from the distance to the construction site alone. Ready-to-move-in building and for the outdoor areas either the garden landscaper comes or you do it during combined annual leave. Although not both commute at the same time, so the one who stayed at home can certainly be active and get involved in the village. Or simply go shopping during the week, that doesn’t take that long anyway.
(The Saturday shopping was taken away from me anyway by the Swiss)

Last point, then that's really enough. During the construction phase, you should go there from time to time and take a look. At the latest when the screed is laid, it must be ventilated... 3-4 times a day. That is already a challenge when you live 3km away as the crow flies...