diesel all the way you are going to get 3-5 mpg better unloaded and probably 2 loaded how you are now with the diesel over the gas. If it is truly a forever truck the 6.7 is pretty proven rig with their new injectors and transmission. Ford has a decent truck put together in their new diesels...
Last land auction i went to with around 6 digits of cash i realized that i am not wealthy enough and do not factor into the wealthy land buyer club, especially when there is gravel on the land and road contracts in the area.
they had a rockchucker reloading kit for like 250 off and a few deals on agm and pulsar thermals other than that seemed like pretty normal prices with extra hype on most things.