Those are mid size cars. A full size is a Lincoln...ect. What can you haul in these cars? Where does the wheel barrow and tools go? How many sheets of plywood can you fit? Can you get a 1/2 to 1 ton in your midsize
Actually, you can haul quite a lot in, or with, a midsize vehicle. I own a Ford Focus wagon. I can put my rototiller in the back, and at the same time, carry up to 200lbs of lumber on the roof rack. I have also hauled upwards of 800lbs of concrete products in the back. Over that weight or for long hauls, I opt to attach the trailer. Now, with that amount of weight, my mileage drops from 30MPG to about 25MPG or less, given the terrain I drive over. It's just a matter of working effectively and safely with what you choose to drive. It can be done.
Now obviously, I can't haul a full sized travel trailer of boat with my vehicle, nor do I use it as a contractor would, but it serves my purposes.
Sure. I used a Festiva to haul more concrete grain and lumber than you did on a regular basis. Of course I gutted it and redid the suspension and tires first. However, I have a truck to do the serious hauling. Festivas and Tauruses just don't have the balls to take on more than the occasional overload.