Yes, the situation is a bit tricky. The house is located right next to the railway tracks, you essentially fall from the house directly onto the platform. But exactly that is perfect for us, since we exclusively travel by train and currently live right by the railway tracks (the tracks run about 10 meters behind the house). But when we were there, the train noises were no more disturbing than they are here, where we currently live.
I can inquire about the floor insulation. Since the roof is 3 years old, I hope it was done at the same time. We are aware that we need to replace the heating system, which is why we wanted to get a larger loan (we have a certificate stating that we could easily get a €200,000 loan).