Mr. Ahmet, who won a prize of 1 million USD by participating in a quiz show, will provide a significant return if he uses it in repo, time deposit and bonds. However, careful decisions need to be made...

Mr. Ahmet, who won a prize of 1 million USD by participating in a quiz show, will provide a significant return if he uses it in repo, time deposit and bonds. However, careful decisions need to be made as to which area to invest. If the money is deposited in the bank, the bank pays interest once a month and pays 16% interest. Mr. Ahmet wants to buy 2 houses, one worth 900000 USD and the other 500000 USD, in the future, by investing this money in the bank. Accordingly, after how long is it possible for Ahmet Bey to buy these two houses with the money and income he earned? If you were Mr. Ahmet, how would you advise him to use this money?