Factually, your future income is not €2300 net. You have to deduct the 50% private health insurance from that. I strongly assume that you are also insured in the company with the blue logo based near Koblenz. You are probably not yet aware of this and it was sold to you differently, but you should be prepared for some premium adjustments. I don’t want to speak ill of any company here; I also have my private health insurance there. A German civil servants’ health insurance fund will not avoid increases of 5–10% every few years either. But you can’t know that at your age. I’m often opposed to these worst-case scenarios in this forum, but here I fully agree with everyone. At 19, you are tying such a burden to your leg without awareness of the accompanying consequences. Now, you are certainly happy, and you might remain so your whole life, but!!! Feelings change, and people do too. Let’s assume you separate in 7 years and not on good terms. What happens to your house? You will either sell it at a loss (because you bought the house at current inflated prices) or you won’t get rid of it and have a hefty loan on your neck. But the worst part is not the loan. You are jointly liable, meaning if one doesn’t want to pay or has no money (due to disability insurance, illness, a new boyfriend/girlfriend), the other has to pay everything. If neither of you pays, there will be an unpleasant legal process. And no, you won’t have only 50% debt and pay your portion regularly, you are obliged to cover the other’s part. €1400 (loan + the bare minimum ancillary costs for the house) gets really tight with €2000 net (€2300 minus private health insurance). Best regards