Good morning,
regarding the income/expenses, one could still comfortably finance about €400,000 here.
€530,000 is very ambitious, and that does not fit the current income situation at all.
On the other hand, when do you get the opportunity in the Stuttgart area to acquire a new property for €600,000, or let’s say €650,000.
(currently, one would probably have to calculate about €800,000, where you still need to invest money)
Therefore, you should consider this carefully.
The "only" thing one could still do here is to try to delay the repayment, i.e., if you say: the woman will start working soon, bringing in €1,000 per month = that relaxes everything.
But as long as she doesn’t work, such a burden would be difficult to manage.
That means you would have to present the bank with a repayment plan until retirement + exclude interest rate change risk!
The good thing is, you still have 37/38 years until retirement.
So you have to set up a plan here where the loan repayment is completed within those 37/38 years.
And you also cover the interest rate risk.
If planned well, you could probably manage at the beginning with €1,800 (possibly even less). Then you would calculate with a rate of €2,200-2,400 in 15-20 years (when hopefully the woman starts working, and accordingly the income is €1,000 higher...)
Only something like this could work from today’s perspective.
If you have any questions, I am happy to assist.