It looks like the machines assist a mechanic in being able to tell if the combination of wheel and tire when mounted are enough out of round to impact the ride of the vehicle...
Road Force Balancing | MotorWeek
Sorry but you may have to adjust your expectations - a Class A RV on the Ford Commercial F53 chassis is never going to ride like a passenger car or light truck. The main thing anyone can do to make the RV ride smoother is to drive at lower speed on bad roads.
So far as smoother ride goes, the only easy DIY thing is to maintain cold tire pressure only slightly higher than the Winnebago label says. I run my tires cold pressure 5% higher than the Winnebago label. If you run them way higher than the Winnebago label the ride will be come quite harsh.