Premium must haves for first truckload purchases?

If you're looking for items that will significantly increase your generation of in-game cash for a relatively low donut investment, I'd suggest getting one or both of the Channel 6 News Van or Worldwide Broadcast Dish. For 30 (dish) or 40 (van) donuts, both have a 2% multiplier and also unlock broadcast tasks for Channel 6 (4 hr for the van, 12 hr for the dish) that pay way more than any other tasks of those lengths in the game.