Southern NH mortgage rates are holding steady this week, with the 30-year fixed sitting at 6.77% and the 15-year fixed at 5.78%. For buyers watching those numbers and wondering when to move, there is an important reality check worth considering: in Hillsborough County right now, homes are selling in 23 days. The rate may shift slightly. The house you want? It might not be there next month. What 6.77%...