The previous owner used to tow a horse float. We will be using ours to get around paddocks, load wood, goats and other farmy things.

Just curious why does he want a Triton (or similar vehicle)? I think the Nissan Navara was better for width and car seats, but worse with leg room. Just a warning, the lower models often don't come with anchor point or even the bolt hole to easily install one. Middle of the range and up tended to be fine.