Bit of a loaded question and the answer depends mainly on what you want out of a coach and how you will use it. The bigger the coach, the more money, more fuel etc. But also the more space you will have. Driving is a concern. Would you feel comfortable driving a 40’ coach? You will have restrictions on where you can camp and sometimes even travel. Also, check your local laws, I know in MD anything over 40’ requires the equivalent of a CDL. Not sure about your neck of the woods.