To support the original poster here once again with a positive example, even if the situations cannot be compared 1:1.
We presented our project in the forum back then. Equity even slightly less than you. Household income about 5000 euros net nearly 2 years ago. He was a civil servant at the federal government in the promotion process to the higher service. She was relatively newly employed in the public sector E10 (so higher service). She had just returned from parental leave. Works part-time.
Loan amount about 500k.
We were completely denied the ability to manage money. (We have financed our lives 99.99% on our own. No significant monetary gifts or financial benefits from the family)
The overall tenor was: don’t do it. You will fall on your face and won’t be able to handle the installments.
Jump 2 years later:
We have been living in the house for a few months. Except for the outdoor facilities everything is finished. Over 20k is still left from the loan (for the outdoor facilities).
We were extremely disciplined with the upgrades, after handover of the house everything was done by ourselves (walls, floors, garden, fence).
We only commissioned the garage at the very end when it was clear that no nasty surprises could happen during the construction phase anymore. Before that it would have been much more practical. But this way it was safer.
During the construction phase, we were able to save over 20k additionally. That easily covered the kitchen, moving, lamps, a few pieces of furniture, etc. We kept many pieces of furniture and will possibly replace them gradually.
Today we got the payslip. We now have 6900 net. (I am now in the higher service, my wife changed to the federal government during the construction phase with a higher salary).
After completion, the equity was back to zero, but now we already have a low five-figure amount in the savings account again.
This is not meant to brag. We built relatively simply. It is just meant to show how wrong the prevailing opinion in the forum can be.
But I already found it presumptuous back then how our supposed lack of connection to money and the 23-year-old with 200k inheritance in the account was credited with great saving behavior with zero risk in the future.
See it this way:
The forum does not serve as an advocate in difficult situations. It is rather the warning voice.
Take it as motivation to show the warners. Be disciplined. Make a precise plan about what it means. Are you ready to endure hardship? To really say “no” often and painfully to offered upgrades?
Then do it :)