The fleet I manage is all fords and all police vehicles ranging from explorers, Taurus, f150. I do communicate with the person that manages a road maintenance fleet, again all fords and trucks. We buy fords and many government fleets do because ford will sell their government fleet products at at extremely reduced price. I currrently have a 2017 expoloer with 9k, it’s on it’s 3rd battery, 2nd water pump, new wireing for the turn signals, new brakes and it rattles and clangs like a 30 year old vehicle. I can go down the list of problems we have had with fairly new vehicles that would surprise you. As far as the f250 and f350, the newer 2011 plus have been reliable, prior to that they were riddled with problems. The new 6.2 and 6.7 have been very good, the early 6.7 has a few issues, but according to the mechanic, fords are a total pain in the ass to work on. They had a 98 dodge 3500 cummins they just got rid of, he was pissed, said it was the last problem free truck that was easy to service, still has its original trans.
I would consider a f250 with the 6.2 or even the 6.7... but don’t plan on working on that yourself.
For a small truck, Nissan or Toyota.