If you consider this mortgage, why go to all interest-free loans if the only one?
I think they are great if you are a commission based job / career. We have a fixed rate bond, so if things get tight, we are able to pay an absolute minimum and when they are relaxed, we can more than offset the reduction of capital by paying more …… . And every time you pay your real capital (interest) payment down ….. Thus, over time, by lump sum payments, the payment against payment of a fixed rate mortgage for eternity or until he has paid to be reduced.