We sell trucks at 75 to 85k. 1 ton GMC vans with fresh water tank, front pads at 60k. Never do the backs. 3/4 ton GMC vans w/o fresh water, never do the brakes. Seattle has hills like San Francisco. An under 600 pound
CDS helps. The mega-slide ins run upward of 1,000 pounds dry, double that with water on board.
Our FedEx guy said his Transit has the brakes replaced every 15k, almost as bad as the early Sprinters. I've also heard complaints that the OEM brake pads wear fast and recommendations are to use a heavier duty pad when you have the brakes done. Or, learn to change pads yourself. Should be a 30 minute job in the driveway.