Is purchasing a house on that scale feasible?

I can only agree with my predecessors. I see the crux in the equity; a healthy financing is at 80% (and here it comes: of the "mortgage lending value"), meaning all ancillary costs are paid with equity. My tip: you have a low cold rent. As long as you don't have children and no urgent space problems, use the time and continue saving to increase your equity, e.g. 1500 EUR per month makes 18k per year .

The 18k is currently relatively easily eaten up by the annual price increases. Of course, the question then is how sensible the strategy is in the current situation. I am therefore torn. I can understand one side, but also the other, which would rather finance fully right away (if the salary is appropriate in relation to the total amount).

... I can understand one side, but also the other, which would then rather prefer full financing right away (if the salary is in relation to the total amount).

Exactly, if it should be right, but it is not here.

The 18k are currently being eaten up quite easily by the annual price increases.

Yeah, that could of course be the case. But none of us have a crystal ball, and maybe prices for existing properties will drop in the coming period due to Corona and the craftsmen’s order books will empty, so that new build prices stagnate or fall in the coming years because the craftsmen compete with discounts? But it could also be the other way around and prices keep rising. Nobody knows. The fact is: if the available salary is too small in relation to the construction/purchase project, then such financing simply doesn’t make sense. Sure, it’s tempting when I see money available at 1% interest everywhere right now. But honestly: if despite these historically low rates I can’t put together a proper repayment and the financial “loss” caused by parental leave (since there is basically a desire to have children according to the original poster) is even higher than the current savings rate including contributions for retirement provision (here: Riester), then this home purchase simply doesn’t make sense. My feeling is that many are currently being spurred on by the low interest rates and want a property at all costs now, because it feels like everyone in their social circle is buying or building right now. I know the feeling of being frustrated because you feel like the only one who doesn’t own a house. I also remember the discussions with my wife, who was very sad about it at first. But then we followed the tips here from the forum and changed quite a few things (salary, expenses, savings rate, equity) and then found an existing property that we considered reasonably priced at a price where we can in good conscience go to a restaurant every now and then and my wife looks forward to parental leave because financially it’s not tight but with a good buffer.

The 18k are currently being eaten up quite easily by the annual price increases.

That may be true, but real estate values are also rising. Although you probably need the same loan amount in the end, the loan-to-value ratio is more favorable. Of course, that doesn't change the problem if the loan amount doesn't match the income. And at least the incidental costs of the purchase could be saved up before considering such a project!

Yeah, said it all.
The number is clearly too high for the salaries.
The household calculation is nonsense too.
If you had €2100 left every month, you would have significantly more equity.
Enjoy your life and the cheap rent, save money, have children, buy later.

The 18k are currently being relatively easily eaten up by the annual price increases.

This sick growth cannot last for various reasons (low interest rates, good economic conditions, catch-up demand for prices,...). I still remember the years 1993-2003, a very sad time for property owners.

Save the money and buy at a favorable time when 'Cash is King'

Those who have taken on too much financially or lost their well-paid jobs or can no longer rent out their properties at high rents or have to sell because of a stock market crash (apparently that happens too, big LOL), have to sell their property at any price. And then you strike!