The 200 must be dolly towed, so yes you need a dolly and you need to rig stop/tail/turn signal wiring from coach to car.
The rent or buy decision will be based on how often you use it. Most people buy one, for convenience if nothing else, but if you only need it once in awhile, a rental may be more economical.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL