Hummm..right out of school, buying a big truck, a cruiser boat and a motor cycle. Where does a place to live, electric and water bills, reliable transportation to get to and from work, medical and auto insurance, savings and retirement accounts, gas/diesel and food fall on the list?
I would buy one a few years old so someone else gets hit with the depreciation.
To answer his question:
No, I wouldn't be a young adult with a heavy duty pickup, especially if it was a 1 ton dually.
An automobile is much needed first--and the truck comes later. And preferably the automobile is a Corvette or Jaguar convertible--a babe magnet.