Planning a Cross Country trip Summer of 2018, what to buy

You're getting some good info on here, but my thoughts, When in '18 and for how long ?
Also for someone that's never owned or used an RV of any type, you've got a whole LOT of planning to do and questions to ask of yourself before considering what type or size.
DrewE's idea of renting for a weekend or even a week, is an excellent idea, you may find out that you really don't want to do this at all, OR, you may be addicted like the rest of us. ;)