I once looked at it with my finger on the map. Nice. 4 km to Geltow, 6 km to Golm to the university, 7 km to Potsdam West. I could probably get by without a car for weeks there.
If your own radius of action does not extend beyond this area, then that may be true. For example, if one of the partners works at the university in Golm and the other at the Army Command, then that fits. But I have assignments all over Germany and partly in Europe, and I often carry so much equipment that not everything can be taken by train. And the lady of my heart has been working for a publisher in Berlin-Friedrichshain for ten years now.
I would wait with these considerations until the time comes. Will your wife still have the same employer in 10 years? Maybe she will have home office in 10 years? Maybe your daughter only needs a bed and a wardrobe because she is only there occasionally? Maybe she studies nearby and stays
Of course, you can’t know any of this. It is an investment in the future. My gut feeling tells me that it can’t hurt to have something like that. Of course, with a piece of land you initially have no income, rather expenses like property tax, but currently the money in the bank doesn’t bring anything either. In any case, I hardly believe that land within the Berlin ring will lose value in the future. If you later decide on a completely different solution, you just sell it again. In the past five years alone, the standard land values in the entire Berlin area have doubled. Actually, I’m already too late now... Matthias