Amount of the monthly installment

So 360k€ with 2.2% interest, 2% repayment over 15 years is a 1260€ rate. Including incidental costs, it is 1700€ for living. The building society savings contract probably on top to secure the term. This means a term of almost 34 years. Well, you are only 29 years old.

Do you save taxes through your wedding?

If your house is not sufficient when reselling, the right of residence helps the parents little. If the house is included, it can theoretically be auctioned.

Are you saving taxes through your wedding? Maybe move the official act forward by one tax year and hold the celebration later.

I don't mean to discourage you, but you are entering this naively and it will be really tight. It doesn't have to go wrong, but it can. If I were you, I would save every Euro possible now. It reduces your risk for later.

Posting the offer here is a good idea.

You have to be clear that living will cost you €1700/month for the next 15 years, with a rising tendency in additional costs.

oh dear. :

First of all, I would advise you to keep the wedding much smaller. We got married this month, civil and church on the same day. Afterwards, we had a lovely party with about 75 guests. We had a catering service for the food, a DJ, a photo booth, and lots of fun.
After deducting the monetary gifts, we ended up roughly breaking even... If we hadn’t been so well supported by our families, I think the wedding would have cost us a maximum of 1500 €. The wedding dress doesn’t have to cost 3000 €, there are beautiful ones for 700 €. The same goes for rings. They don’t have to cost 60 €, but also not 2500 € each. You can get decent ones for 200-300 euros!

Yes, e

The wedding is already completely planned, everything booked and paid a deposit on.
Tax-wise it doesn’t bring us anything, because we are switching to tax class IV and IV.
Our offer from the Sparkasse is 342k, 2.2% interest, 2% repayment, about 1200€.
The 360k was just a consideration in case we enlarge the house. But we probably won’t do that now.

Your advice is well meant, really kind, but a wedding taking place next year is already roughly planned and paid a deposit on, and the food / location is by far the most expensive.
However, I also think that after the wedding they will have more money left over than they currently think. When planning you don’t count the money gifts, that would be similar to a bank calculating with an expected inheritance when building a house.