straight loads are fine, get used all over the country,
Now to the one horse. On the surface it seems ok as you only are hauling one horse, They would make sense IF and a Big IF, they were half the weight, half the cost, and half as hard to tow. But they are not. So there really isnt any advantage to them. They are a bit lighter but most of the weight is in the frame, they are pretty rare and they cost the same or more than finding a two horse. Also on resell. A good shape 2 horse bumper pull will resell quick. One horse ? Not so much. If you have a smaller tow vehicle where every pound counts, maybe they would make sense. I am just not seeing alot of advantages to a one horse.