The rated hitch weight, is only an indicator of what that hitch, when properly installed on an appropriate vehicle can handle. Be careful not to exceed your GCVW, which includes the weight of your motorhome, plus everything you load into it, including the people and pets, and then add the weight of the vehicle you plan to tow. All of than can not exceed the GCVW, usually on a label in the door jam somewhere. As far as a braking system in the towed car, most states require it in any car you tow, those few that don't, should, and common sense and safety concerns make it mandatory.
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