End-terraced house 485,000€ credit loan. Is house purchase financeable?

If then the money is missing for other things, such as school trips for the children or for cinema visits, you notice the "debt mountain" not only with the monthly bank debit.

Well said, but that was not my post. Your point is to be clarified through a household budget and not through life plans of forum members.

Apart from that, I am simply in the th

I am generally also in favor of "not sensible" but only have limited confidence in the very generic statements and would suggest a slightly different approach.
How much have you saved in the last 2-3 years? This should on average be at least €1500 per month for two reasons:
1. The rate for the house is about €800 above your current cold rent and the ancillary costs (including reserves for contingencies) should also be somewhat higher than for an apartment, so here also €200 -> €1k additional burden compared to now
2. Plan €500 as a savings rate for car, unforeseen expenses, etc.

So now we come to the point that you should also have this €1.5k during parental leave, either due to ongoing income or, for the planned period, by monthly dipping into savings and mentally adding it, which goes beyond the equity for the house.

This simple calculation means that you should have saved the current equity completely in the last 2.5 years.

In my opinion, there are several weaknesses here. Certainly, it first depends on what remains at the end of the month. And in my opinion, that is already too little. I still doubt the rate of 1,360 €. This is simply too low for 485,000 €. That is why I also estimate that there is simply too low a repayment rate included here.

Until your retirement, you roughly have 30 years left to pay off the loan. This would be a repayment rate of 2.5%. With an interest rate of 1.66%, this already results in a monthly burden of almost 1,700 €.

With a low repayment rate, there could be problems at a higher interest rate when the loan is extended. An interest rate of, for example, 3% and hardly any repayment until that point would barely be affordable for you.

Realistically, it would look more like this:
Income 4,000 € - 1,700 € - 2,240 € (living costs per month) = + 60 €.

Parental leave, a broken car, or vacation would hardly be feasible here. With an income of 5,000 €, I would still say OK. It could still work.