The idea behind paying off a loan faster than scheduled is pretty simple: It saves you money. That’s a huge part of the reason Andrea Stewart and Jerimiah Honer decided to repay their 30-year mortgage in just seven years — by doing so, they saved more than $130,000 in interest.ow They Paid Off a 30-Year Mortgage in 7 Years. The property itself had a huge impact on the couple’s ability to put a lot of money toward their home loan. The house is close to downtown Sacramento, allowing them to easily commute by bicycle and sell their second car. Honer and Stewart also grow most of their own food.