Cool.@kmccune a cargo bike would be no better at hauling plate steel, and actually worse, as there is no place for a 3'x5' piece of plate steel to fit and that would exceed the bike's GVW. Those cargo bikes also have the same Bosch Performance CX motor my bike does. As with cars and trucks, you can tow a lot more than you can haul directly in the vehicle. The cargo e-bikes are basically the crossover SUVs of e-bikes. Towing with a properly designed bike trailer is perfectly safe. Note that the photo was taken after I got home and removed the ratchet straps and kayak straps securing it and two other pieces of steel. It was not just resting on that wood frame like that, it would have slid off as soon as I started pedaling, plate steel is very slippery.
That said, I have to wave people off of my Gorilla Mode mad cyclist experiment. I had written a lengthy explanation, but my browser randomly closed and I don't have the heart to re-write the whole thing. Suffice to say, high center of gravity and independently turning front wheels are an issue.