Hello Murmelstein, renting out the existing property is a possible alternative. However, in that case, your total loan amount would be approximately €1 million. Banks have higher requirements for credit assessments when the total obligation exceeds €1 million. Also, building societies generally do not agree to a lower repayment rate. Therefore, you should obtain offers for both options in advance – and openly discuss the process with the bank/financial advisor you trust. If you have any further questions, I am happy to assist you. Best regards