Hello Burner 610,
1) BHW also offers pure annuity loans, but when you inform yourself, I am not aware of any situation where I could score with BHW conditions.
2) The KfW funds are not deducted from the loan-to-value ratio, meaning that for the conditioning of the 160,000 euros, 260,000 euros are used as the basis for the loan-to-value ratio.
3) KFW 153 has a repayment portion of 3.088 %, with an interest rate of 0.75 %, this results in a monthly interest and repayment rate of 319.83 euros. After 10 years, there is a remaining debt of 65,909.20 euros. Repayment only begins after one year.
4) The 160,000 euros can now be individually designed, i.e., to be able to calculate with a total monthly interest and repayment burden of 1,000 euros at the highest possible security, this would then be a 20-year full repayment loan, meaning the fixed interest period is also the loan term. Whether 1,000 euros is enough then depends on the underlying conditions for the full repayment loan, which cannot be determined and named here, as the total costs (including all acquisition ancillary costs such as notary/real estate transfer tax, as well as kitchen and furniture) and thus the loan-to-value ratio are not known.
5) Thus, one could (just an idea) conclude a home savings contract for the residual debt from the KfW funds of 65,909.20 euros, where you pay in 24,000 euros over 10 years to secure the follow-up financing of 65,000 euros at 2 % - 2.4 % (depending on the tariff), which then consists of 24,000 euros home savings credit and 41,000 euros purchased home savings loan.
Some banks like Deutsche Bank with 0.5 % and the Münchener Hypothekenbank with 0.35 % offer subsidized KfW funds, but you should not be deceived by this, as it is also decisive what these banks offer for the 160,000 euros. The decisive factor is then the mixed interest rate of both loans to be able to decide on a model (with or without subsidy).