I believe that was somewhat unclear from my side. My suggestion refers to the property and not to any loan of an unspecified amount...
So, buy the property as financing and hold equity for a future house. This way, you already have a smaller loan with good interest rates now and won’t be at a disadvantage later. Of course, no one can predict the interest rate development. But the fact is that interest rates are rising again at the moment. It was just a thought...
If that is a decision criterion for the seller of the property, that you can buy immediately through the equity, then that is already resolved anyway. Best regards