Is the city villa price reasonable?

Well, I did everything right when I moved back from Stuttgart/Lubu to my home Elbflorenz.

I can hardly wait to finally live there. Well, for us it's the Neuseenland, but Elbflorenz is only "a hop" away.

If you install underfloor heating with a heat pump, then the towel radiator, if you really want it, only with electricity. Under no circumstances use ones connected to the heating circuit.

What is the reason for this approach?

Hydraulically difficult to integrate, efficiency not given at supply temperatures of a heat pump

You then have a metal radiator in a plastic circuit that dirties your entire system. In addition, you need a high flow temperature for radiators, but the heat pump should deliver as low a flow temperature as possible. If you want additional heating in the bathroom, use a wall heating system or infrared mirror heating.