In Southern New Hampshire's real estate market, homes are selling in record time. Data from Hillsborough County shows homes averaging just 18 days on market in Q1 2026, down 50% from 36 days just a year ago. This dramatic shift tells us something important about what's happening right now in towns like Nashua, Amherst, and Mont Vernon. Why the Speed? The answer is simple: limited inventory. With just 1.4...