Standing on the ridge overlooking her coastal California farm, Teri McCall sees her late husband, Jack, nearly everywhere. There, atop the highest hill, is where the couple married in 1975—two self-described “hippies” who knew more about how to surf than to farm. Midway up the hill, on a lush plateau surrounded by the lemon, avocado, and orange trees Jack planted, sits the 800-square-foot house the then-young Vietnam War veteran built for his bride and a family that grew to include two sons and a daughter. One of those sons now lives there with his own wife and small son. Solar panels Jack set up in a sun-drenched stretch of grass help power the farm’s irrigation system.