My husband and I have a dilemma. We are not sure whether we should use our savings to pay off our mortgage or put a down payment on a new mortgage for a rental property? Our current home has a $174K balance at 4%, we could pay this off in 7 years. If we bought a rental property in our neighborhood we would spend no more than $200K. Currently, our household income is $175K, and we are concerned that my husband's career field may dry up in the future (10 years or so) and reduce our income. So my question is should we use our extra funds to pay down the mortgage or buy a rental? We live near 2 universities so could rent easily for at least $1,600/mth.