One thing that I feel is important is the ground clearance of the tow vehicle.
Obviously, SUV's ride higher than a regular sedan. The reason I feel that this is important is to avoid road debris. Over the last 9 yrs.. of RVing, I've had to dodge, straddle, or run over things in the road.
4-5 yrs. ago, I was driving along the interstate and I noticed in the distance a vehicle swerve from the 'slow' lane into the emergency lane. I thought that there must be a reason so as I got closer, I could see an aluminum ladder on the road. So, I swerved too into the emergency lane to get around it.
If I had to roll over it, I know the motorhome would have cleared it and I think the Honda would have cleared it too because of the ride height. A low-slung car most likely would not have.
Also, a big RV can't react to swerving quickly and we sometimes have no choice but to run over whatever is in the road (gator, etc.). If I have to straddle that 'item' in the road, I don't want it to get caught under the tow vehicle.
So, my tow vehicle will always be some type of SUV. And, it will have AWD/4 wheel drive.
Safe travels,
MM.