Well I come from a Ranch/Rodeo family from the south east courner of Washington and in my Family the ranch trucks only tend to last around 5 years at the most then you trade it off for a newer rig. Now there are some pick-ups that never leave the ranch(grandpas last truck died in feild next to a fence and there it sits to this day) But truly it comes down to what you can aford. I know some ranchers that buy a new truck evey year and some that will only buy new when their old truck is just DEAD.... My self I am no longer on or near the ranch and I still drive a 4x4 extra cab built in 2004 even thought I really dont use the 4x4 I just cant seem to get away from it... Im sure that really didnt help, sorry..