What California asks of a build
Build for range between two extremes. A vehicle used here works from 282 feet below sea level in Death Valley to a paved pass at 9,945 feet and a dirt road ending at 11,000 feet in the White Mountains. That is a cooling and a heating problem in the same truck, and it changes the conversation about radiators, fans, insulation and where the batteries live.
Then build for tires and self-recovery. The Park Service asks for two full size spare tires on Death Valley backcountry roads and says rescue is likely to be extremely delayed. Carrying capacity for water, fuel and a second spare matters more here than articulation, because most documented routes are long unpaved roads rather than rock.