Motor home mounted tow bars have a number of advantages over other types of towing equipment. While most towing set ups require the motor home to have a drop ball mount, these mounts can be problematic as they ride low to the ground and can scrape when the RV goes over a dip. Car-mounted self-aligning tow bars are easy to hook up, but because they're mounted on the car, they have other issues. The extra weight on the car can add to wear on the suspension and brakes, while negatively impacting fuel economy. The car mounted tow cars can also be stolen off of the car.
In contrast, a motor home-mounted self-aligning tow bar has all of the benefits and ease of use of a car-mounted self-aligning tow bar, but none of the drawbacks. When not in use, the tow bar can be securely folded and locked to the RV's hitch.
But undoubtedly, the main advantage of motor home-mounted self-aligning tow bars is how easy they make hooking up the RV and tow car. With most towing setups, the vehicles have to be perfectly aligned before setting off. That means maneuvering the vehicles within a range of less than an inch. That's pretty tough, especially when an RV is involved. With motor home-mounted self-aligning tow bars, the two vehicles need to just be hitched together -- once they start to move, the self-aligning bars lock into place, making the two vehicles perfectly linked.