I ended up towing the Mazda and had a driver for the Tahoe. The 24' Budget truck was loaded to the roof all the way back to the door then towing a Mazda 3 on the car hauler. Took about 22 hours to get from Houston, TX to Milwaukee, WI. Not sure what kind of mpg the Tahoe got, but we didn't dump fuel into it near as much as we did the moving truck.