I don't think there's a great price difference between an F-150 and an F-350. 150s run roughly $50,000 to $80,000. There are a couple that are cheaper than 50 but do you really want the base package with no rear seat? F-350s, skipping the f-250, Run just a couple thousand more per model level. An F-350 Dually is 85 to 90, and that's pretty much top Line, diesel and all, not a basic dually. So I'm not understanding why anyone would hold up upgrading to a real tow vehicle for a couple thousand dollars. And if you take a package that's a single step lower, it will probably cost the same. I had no problems with my F350 dually for the nearly 20 years that I owned it. Of course, I didn't have to deal with DEF.