Have you looked at the John Deere Gators, or the Kabotas, or a Yanmar? A friend uses a Yanmar diesel for his tree construction company, for clean up around yards, and pulling equipment into yards when he doesn’t want to drive into it with a full sized truck. I don’t think it has ever been driven above 20 mph in its life. It runs forever on a tank of diesel. I am not sure on available, or price, but it is a work horse for sure. If I was in the market for a new utv for the farm, I would at least check one out.
And the Yanmar UTVs are built in your area.