Since I'm about the only no so far, an explanation;
The OP mentioned a couple long and remote roads or trips, all things mechanical can break. The manufacture bailed out of North America, so my thought was to parts, not so much to having work done. As mentioned too, what was the truck used for, who had it and what model is it? 150K miles isn't really high mileage but certainly enough to begin having some issues, like any other vehicle.
My initial thought, all things considered as to what we know, the concern is about maintenance and parts. I'm sure most (or all) can be located, but from where, how long does it take to get them and at what cost. This explains why I have a Jeep and a F-150 and on any long trip in remote areas I'll be in the F-150. Nothing against Fuso, but I'd be concerned about reliability in the middle of nowhere.