They will tell you exactly what you'll need to tow the vehicle. Of course some cars can be towed four down without all these problems. Because they're MADE to be towed without a dolly, and without any Remco type device to modify it for towing. These will be much less cumbersome. That's what the towbar attaches to.
Every car needs a baseplate specifically designed for it.
Most popular tow car is Saturn. Honda CRV is only Honda that won't void warranty if you tow it. The safety chains or cables also have a rating which much be greater than the weight of the toad. It's best if it's purely horizontal. But if the toad is small and the back of the motorhome is high, this becomes increasingly troublesome in panic stops.