Cost of Driving an EV

That is about how long it takes me to cut my grass with a 42 inch riding mower

Just about 1 acre of grass
Right. If the grass is relatively short & dry, and You walk at a good pace, You can cover about 1/2 acre. But the faster You walk, the less the quality of cut, because the motor speed tends to stay on low in those conditions(light load). I considered buying 2 back-up batts, would cost almost as much as buying a 2nd mower....which I might....