[oil pan 4]

You seem willing to believe shrills that produce misleading click bait.
MPG aren't electric range. A seemingly insignificant MPG drop on an ice can be huge changes on an electric. If you had experience towing electric you would know this.
What someone did with a 1 wheel trailer that's specifically built to be as least like a normal trailer as possible is irrelevant. What you did with a tractor trailer back in the day is completely irrelevant unless you are planning on buying a tesla semi even then relevance is limited.
I have the monopoly on electric towing experience.
Best thing you can do going from ice towing to electric towing is forget everything you think you know.
I made the same mistakes thinking I could take a known MPG drop with towing the trailer on an ice and use that to predict an effect on EV range.
I immediately realized everything I thought I knew was wrong when the insignificant MPG drop I saw pulling my empty trailer (about 1mpg, less than 4% drop in fuel economy) became a 20% to 25% range reduction when towing electric. I knew electric vehicles were much more efficient and would likely be more sensitive to something like a towing a trailer. I figured the less than 5% MPG reduction would be around a 10% range reduction, worst case scenario a 15% range reduction.
All things you would know if you had any useful experience on the subject. So a trailer that causes a 4mpg reduction you could be looking at range being cut at least in half when that trailer is put behind an electric, under ideal conditions. Once you add cold, cross winds or head wind and running the heat yeah the range could be 1/3 what it was unloaded in warm weather. But you weren't thinking about any of that.