truck

Get an ecoboost. Beats the tundra in towing and power. And as for diesel id say get a duramax or 6.4 or 6.7 or 7.3 ford

If you do enough and sizable loads go with a medium duty truck with a diesel. I may suggest international with a dt-466 and a 7 speed if you have a MN. class a license. If you only have a class d license I would go for a chevy c-60 with a 4-53 Detroit diesel and you'll get close to 18 mpg with hydrolic brakes and being under 26,000 lbs gvw..