First of all, thanks for the attempts to help. I am self-employed and my income is high but fluctuating. The house including additional costs is about 630,000, from which the equity would at least be partially deducted. That is why I would personally like to have a base rate of 2,000 euros per month, as we will almost certainly always be able to pay that, then increase it to 4,000 in normal times through special repayments.
My goal with the question was therefore less to assess my concrete situation, because you can of course assess my income fluctuations even less than I can. Therefore, I wanted to say as little as possible about myself and ask more generally in order to clarify what kind of employee income a bank would require for such a project. Clearly, it is difficult to say that down to the euro, but I would at least like to have a rough figure. Let's assume a net income of the gentleman of 2,000 euros, which is clearly too little. 3,000 euros would be unrealistic. In my assessment, 4,000 euros and an extremely frugal lifestyle would slowly become possible, but that would already be very extreme and everything would be subordinated to the house with hardly a cent left for special wishes. From 6,000 euros, I would assume that it is quite unproblematic, because later the wife’s income will also come into play. So I would prefer a table like the one below. What do you say to that?
1000 - no 2000 - no 3000 - no 4000 - rather not 5000 - maybe 6000 - possible 7000 - yes 8000 - yes 9000 - ....