I'm not sure I can concur with comparing selling RVs, especially motorcoachs, to everyday cars. Sure, they 'seem' similar, but a car is a car, but an RV is like a house on wheels, and their are plenty of different brands, floor plans, models, sizes, weights, and manufacturers. Most 'salespeople' at a car dealership own and drive cars everyday... but on the flip side, most 'salespeople' at an RV dealership RARELY even use an RV, much less know them well, even though they may be around them every day.
The only way to REALLY know an RV or motorcoach is to LIVE in one for a week, without being plugged into electricity, or have access to city water, or sewer.
That is a crash course that every RV salesperson should be required to take!