I'd much rather spend half as much on gas, make much smaller payments and then just pay U-Haul $100 or so for the one or two days a year I might need one (plus you can rent a much larger truck than a Silverado/F-150). So I drive a subcompact hatchback and rent a truck if/when I need one.
It's not even for the environment either. I just don't like sitting up high and I find large vehicles difficult to park and maneuver.
Most of the people who run a riding barn probably do have a big-ass track to carry a horse trailer around but most of the people who start a riding barn lose money at it. (We've seen three individuals go out of business running a big horse barn down the road... It finally got somebody who is sensible.)
We started out really small (just two) so we never wound up with a large herd of unprofitable animals the way a lot of people do who feel pressured to get 10-15 horses right away.
The usual justification for that horse trailer is to go to and from horse shows which we don't do. When we get a new animal (maybe once every two years) we pay somebody with a truck to haul it for us.
I'm European, but the whole use case for trucks seem overstated to me always.