Financing plan single-family house 150sqm

Pretty! Solid like-new house! No comparison to the one in Eutin. Buy!

[*]€384,000 from DSL Bank, 1.44% effective interest, 20 years fixed interest period, 1.965% initial repayment, €1,083 pM, 38 years theoretical term, outstanding balance after 20 years: €209,600

[*]€384,000 from DSL Bank, 1.19% effective interest, 17 years fixed interest period, 2.205% initial repayment, €1,080 pM, 36 years theoretical term, outstanding balance after 17 years: €224,800

Evening. I spoke again with my financer today. For the first module from DSL Bank, the conditions have changed slightly. However, he also worked out a second option for me. I will compare both here and would like to know from you afterwards whether my thoughts and conclusions are correct:

1.

[*]€384,000 from DSL Bank, 1.44% effective interest, 20 years fixed interest period, 1.965% initial repayment, €1,083 per month, 38 years theoretical duration, remaining debt after 20 years: €209,600

2.

[*]€384,000 from DSL Bank, 1.19% effective interest, 17 years fixed interest period, 2.205% initial repayment, €1,080 per month, 36 years theoretical duration, remaining debt after 17 years: €224,800

I then looked at two scenarios.
First: I have a remaining debt difference of €15,000. With Plan 2, I can easily repay this within 3 years. According to the repayment plan, I actually repay €33,000 in that period—if I continue calculating with 1.19% interest.
Second: Using my repayment Excel, I calculated how high interest rates could rise for the follow-up financing after 17 years so that I can still repay more than €15,000 with the same loan rate. I arrived at 3.75%.

Of course, you cannot look into a crystal ball and predict what interest rates will be in 17 years, but I continue to expect low to moderate interest rates in the long term.
What do you think? I am leaning strongly towards Plan No. 2.

I specifically registered now so I can also give my two cents.

How do you actually end up with such high expenses with your income? Like €5000 income and €2500 expenses without rent?
You could easily have saved €100k by now.

I specifically signed up now so that I can also give my two cents. How do you actually come to such high expenses with your income. So 5000€ income and 2500€ expenses without rent? You could have easily saved 100k by now. What can also be predicted quite reliably is the fact that your construction costs will probably increase by between 20 and 30 percent. Of course, estimated. At your construction start, it could also be more. Just as a small side note.