We have one personal property and 10 rental properties, two of the rentals are on 5 year arms. The question is, should we continue to buy properties on the arms, start to pay down rentals, or pay down our primary residence (on a 2.65% interest rate) so we can leverage it as a line of credit in the future? The bank we work with is allowing us to buy additional properties but we want to know what our best option is to move forward from here? We are in our 30s if that makes a difference....