I have to add that in about 2 years there will be a new development area. But there the prices will probably be over €100 compared to the current €50 per sqm The location would also be great there. Overlooking the (still) open field
If you can afford it financially and timewise, I would rather buy a plot in the new development area. However, I was born in the city and have spent almost my entire life there. Regarding the farmhouse next door, I would also have concerns about the noise level Monday to Sunday, tractors, agricultural machinery, etc.