Selling a house and renovating another, which way is right?

You only need €65,000, a bridging loan costs about 2% interest. You don't pay it down until the loan is repaid. So that makes about €110 additional burden per month.

Oh, well then that’s not a problem.

The 110 euros are in excess.

Although I didn’t state any equity, there are already a few euros left over each month, it’s just emergency money for car repairs, a new washing machine, dryer, or if something happens with the heating.
I didn’t want to use that money as equity but I think deducting the 110 or 120 euros per month for the interest is okay.

Many thanks, now I'm slowly starting to understand it.

At Interhyp, you can also select "variables Darlehen" in the interest rate calculator, just a tip from me. However, they want you to enter at least 1% repayment, but I know it as not repaying (that's how I did it).

Ok, I’ll just call Interhyp and Dr. Klein tomorrow and inquire. I have nothing to lose. Thanks again.