Which financing option should I choose?

Thank you very much for your answers. I will calculate everything again in the next few days and see where I am paying how much interest. Then I will decide which risk I will take at which repayment and interest rate.

Only the credit interest is usually negligible today.

Well, for that you then borrow your own money at expensive interest.

And repayment substitute is like coffee substitute: it’s okay, but tastes like sh... :-o.

In financing for owner-occupation, repayment should be the priority. Secondly, securing the remaining debt. In the example, one could calculate with a home savings contract of over 60k after 15 years and a new 100k annuity. For the home savings contract, about 30k would need to be saved in 15 years (2k p.a. or €167 p.m.). I would classify that as a “self-runner.”

Furthermore, here (with the low land value) the lending value should not be neglected either. High safety discounts from the bank will be to be expected. A house on land that is worth nothing is also worth nothing (not much). Another reason to watch the remaining debt.

Also, if all goes well, a high net income is available. That should be flexibly integrated into short-term opportunities. That is better placed in repayment than in savings at zero interest.