The RV (Recreational Vehicle), as represented by manufacturers like Winnebago, is a product for which there may sometimes still be a need. But it is no longer one's only option in terms of portable lodging, and it definitely isn't the coolest option.
The problem with the typical RV, in my opinion, is that it has an industrial appearance which would never be confused with an actual home. Park one of these babies out in your driveway, and it will definitely stick out like a sore thumb.
However, it is now possible to buy or build portable housing on a trailer which can be parked in one's driveway at home, and which looks like a REAL home, with warm wood siding (and maybe even log siding), a front porch, etc. Companies like Tumbleweed Tiny House Co and Portland Alternative Dwellings will sell you plans which will enable you to build your own tiny houses mounted on trailers, as a means of paying a lot less. Of course, there are also companies which will build such products for you, if you feel intimidated by the idea of building your own, despite the fact that it's so easy that I know of a YouTube video showing how a 16-year-old kid built his own house on wheels, and despite the fact that these companies offer workshops for those who could use guidance and advice about how to build such houses.
Some models are inspired by the old gypsy vardos which were once towed from town to town by draft horses. However, with the possible exception of the Amish, folks don't use such horses for transportation anymore, so the newer models are designed to be towed behind trucks and cars (and dare I say it, behind RVs such as one might buy from Winnebago, as seen at this web page).
The other trouble with RVs is that they tend to be EXPENSIVE! Do-it-yourselfers would be hard pressed to build their own RVs comparable to the Winnebago. And they would be equally hard pressed to build products of that nature which bore their own unique personal touches.
If you still envy the metal look of an RV, you can always use aluminum siding, as shown at the Tumbleweed web site. Personally, I have no idea why that would appeal to anyone, but then again, I have always longed for my own log home in the woods, ever since I visited the Old Faithful Inn in Yellowstone Park when I was a kid.
