Wealthy customers are always interested in the amount that will ultimately have to pay. Therefore, the installment plan is quite happy with them, even if it is not free. Under standard conditions today, overpayment will be about 6.5% of the full housing price. For a mortgage under similar conditions, overpayment will already be double. This is not to say that buyers in the economic segment do not know how to count money. They simply are not able to purchase an apartment in another way.