Depends do you have the money for RV parks to park such rig pulling a trailer, cause most campgrounds with a semi pulling a trailer won't fit such accommodations.I have years of experience traveling and learned from them. The mount the box on the chassis is the cheapest way, yields less room, easier to maneuver, less maintenance, more free campgrounds you can fit in and lastly won't leak like a travel trailer. Here is what I speak from on experience
https://www.truckconversion.net/foru...kenstein-7841/