Yes, I think this will likely be unavoidable regarding the incidental purchase costs, as we obviously have to be glad to find any bank at all that will lend us money for our project.
No, it can be done differently. Most banks should be able to make you an offer.
But for incidental purchase costs, interest of 6-7% will then be due. The kitchen can be financed correspondingly later at the kitchen studio at a higher price.
If you want it cheaper, you have to trick with the parental house. Or use the existing equity for the incidental purchase costs as well. That’s what it’s for.
But then why does the parents’ house come up? Are they supposed to take out this loan in their name? I just don’t understand.
But you said in the initial post that you want to have the parental house pledged:
originally, we wanted to use my wife’s parents’ promised single-family house as collateral.
Are you and the parents even aware of what that means?
Addendum:
At the last appointment, however, we mentioned that we no longer feel so good about it and would like to leave it out.
Good. But then make it clear to the advisor that he has to prepare a new offer.
I agree with the advice that you should look for another advisor whom you understand better and who understands you better. The chemistry is not right.