Only one credit component or several credit parts?

On paper, we are actually in a good position thanks to the early inheritance and interest-free loan within the family (each secured).

Assuming you have a 1% nominal interest rate and pay 1500 euros monthly... bam, you'll be done in 12 years. So I would fix the interest rate for 5 years and pay it down aggressively. But I don't know your income...

I think that through inheritance and the interest-free private loan, the equity is good, but the income is by no means sufficient. And even if the private loan counts as equity, it still needs to be paid back.

In this respect, a 1500€ installment is probably not feasible (even though I don't know the income).

Since it was mentioned in another topic that one should rely on several components, I now wonder whether this should also be considered given our financial circumstances.

I don’t exactly have the greatest understanding when it comes to more complex financing models. And what I don’t understand, I don’t want to commit to. We were advised from various sides about KfW, home savings contracts, Riester, all cheerfully combined with an annuity loan. Personally, that’s too confusing for me, so we have a single, plain annuity loan; I know the outstanding balance, term, installment, and interest, I understand that and feel comfortable with it.

One should also never forget that the seller/financial advisor may have different interests than yours when they offer home savings contracts or Riester.

Then you compare future interest rates with current salaries. You ignore that in times of high interest rates inflation was accordingly high as well, so salary increases must be taken into account. Ultimately, this is a comparison of apples and oranges.

If there is more in a few years, that's good. But no one can count on that for sure. If you don’t make a proper career jump in the next few years, the usual salary increases after 10 years won’t save the day.
Those who already earn a lot now, of course, don’t care. But they also don’t think about interest rate security after 10 years.

If there is more in a few years, that’s good. But no one can really count on that. If you don’t make a proper career leap in the next few years, even the usual salary increases after 10 years won’t save the day.

If you compare the interest rate curves and the inflation curves of the last 30 years, you will notice that they are quite identical. That means that rising interest rates are accompanied by rising inflation in the long term. And every borrower actually wishes for inflation, because even if the salary only increases with inflation, the installment automatically becomes less valuable. So if interest rates, as you assume, slowly increase from 1.5% to 4.5% over the next 10 years, inflation is again estimated to be around 2%.

Since this does not happen suddenly, an interest rate increase could even have a positive effect, provided that the borrower uses the leftover money for special repayments.

We have a term of 10 years and still 260,000 outstanding. I have no worries about that at all. If the income is good, one can, in my opinion, be more willing to take risks. Complicated structures and long terms were not for us. Therefore, we decided on a fixed interest rate for 10 years in a single component, with the option to make a 5% special repayment each year.

Since it was mentioned in another thread that one should rely on multiple components, I now wonder whether this should also be considered given our financial circumstances.

Have these financial circumstances already been described in more detail somewhere? Please catch up on that, otherwise there will only be theories to read here.
You have already mentioned the loan-to-value ratio and financing needs – how should the annuity or the monthly installment look? What salaries are available?