What is this in? 30k fuel filter intervals is not a good idea unless that thing has like 3 big fuel filters. I. Understand that's what the book recommends but i would not follow that.
So this is the opinion of a heavy equipment mechanic.
Unless your towing on a daily occasion I would go gas. The common gas engines have no problems going well over 200k if maintained well in pickup trucks. The cost of servicing a diesel pickup vs a gas pickup is the biggest thing. Your gonna...