Building the return of rural exodus back to the home city or countryside land plot

In addition, a distant relative of my wife would also buy the property from us for 180,000...

Yes, then you just have to figure out what you might be able to buy in the city for which price.

Although

For me, it's a horror when I stand at the butcher's and the clerk knows who I am and what I'm about to order. That's an absolute nightmare for me.

... that could also happen to you in your neighborhood, where you often go to the same butcher because he simply has a great offer.

Oh come on... we live in a town just barely, so just over 100k inhabitants, and my husband cycles past the bakery every morning on his way to work. When they see him come in, they always put the croissant in the bag beforehand. There's nothing wrong with that, it saves time. I can understand the concerns though – you just have to take into account that in a small town there will definitely be faster gossip if you do something different than usual.

Doesn't make sense, the woman can also stay at home

or man.

What social pressure?

Funny, this happened to me in the city.
There was a small corner shop where the assortment was exactly tailored to the residents of the neighborhood. They knew what Müller's cat eats, that the Mayers only eat organic, and that the student across the street is a vegan.
Analog Google
Extremely practical.
There was also the neighborhood pub, the second living room for many, and the [Bildzeitung] of the residents

Write yourselves a pros and cons list.
Look around what kind of home ownership you can get in the city and what appeals to you

A very interesting topic.

I moved to a village of 1,000 inhabitants for love, to be with my wife. Before that, I had already lived in a village of 2,500 inhabitants.

Within a 30 km radius, there are several towns, many good/large/well-known employers.
The plot cost €93/m2 here (2009).
I just got back from a training in Böblingen (near Stuttgart/Reutlingen/Metzingen). The noise, the dirt, the visible stress of the people... In my opinion, the construction prices and land prices there are absolutely overpriced... (Houses from the 70s, completely in need of renovation including heating, starting at €700k. Why, a plot with 800 sqm and barely 400 sqm of garden.
A 2-3 room condominium (20 years old) in need of renovation, starting at €280k.

And especially I couldn’t handle the anonymity with our two small children.
We go to the local bakery, and the little ones get a ladyfinger cookie as a gift - even if they are not there.
Or the neighbors take turns going with the first graders to the bus stop. (This is all in a large housing estate with young parents)
If you don’t want to take the kids shopping for an hour, the nice neighbors sometimes take them with their kids... Then it goes to the trampoline. Or you go to kids’ gymnastics with the kids in the neighboring town and know the others.
Or or.....

Warm summer evenings regularly end on a neighbor’s terrace with a cool drink (baby monitor in tow)...
And yet you can also sit alone on the terrace if you want peace.
1-2 times a year there is a street festival...

I find this - even if often considered standard - a pleasant rural life.

Even here, due to the increased construction prices, no "idiots" have a house. The monthly income has to be quite good...meaning you do have interesting neighbors ("development manager pharmaceuticals, purchasing manager, sales manager, team leader IT). That means interesting conversations are possible and not just the usual - how was the soccer game Bayern vs.....

As a conclusion:
You also have to consider for yourselves, also with regard to further family planning, where you feel comfortable.
If you currently still appreciate the advantages of the city, then stay there. For later (maybe one of you wants to scale back career-wise - or have more children?) then keep the plot as a reserve.
Who knows if you might get the urge someday and want to build something age-appropriate for old age.
Having a plot already is the first foundation.

I wouldn’t sell the plot.
At worst, you’ll still be able to sell the plot in 5/10/15 years. See it as a reserve.