Depending on just how you plan to use it, the choice might be "fifth wheel plus tow vehicle" vs "motorhome plus towable dinghy."
When I am just travelling and staying one place no more than a night or two, the motorhome works fine. When I am staying in one place three nights or more, I want another vehicle to get around. That has meant the purchase and maintenance of a second motor vehicle for use as towed vehicle, as my pattern of RV use has changed since my wife's death.
So if you are thinking about a fairly large RV (fiver suggests that) and staying anywhere for a while, cost comparisons should probably include a towed vehicle for the motorhome option.
