No mention on load capacity. Sure you have a fold out bed to hold lumber, but can it hold the weight? What happens to the battery life with a proper load.
Not defending the car, but weight doesn't affect battery nearly as much as aero. If you had say 1000lbs of flat plywood you'd lose a small amount of range but if you instead had a 500lb dresser that created a bunch of wind resistance you'll lose far more range.