You nailed it. Long distance driving as the norm. Modest incomes, but still driving expensive pick-ups. Gas is a major expense in this case. If you can save on electric, then this thing would be looking really good.
I don't think I would trust a Tesla to the rigors one exposes trucks on farms, acreage properties, etc entail. Rural areas are a mix of some newer but also a lot of older trucks.
Gas is one expense. California and some other western states (WA) are doing what they can to ramp up licensing fees on older vehicles to make them less affordable.