This is what the family of a friend is doing ...

I have actually towed one and I personally wouldn't consider them practical on the highway, but they are wonderful out in the "rough." I wouldn't recommend towing one of these above 40 mph, however, I have seen them moving right along, matching traffic at 65+. But the real reason for the "wagon" design even today is that they are movable with an ATV or even a horse (which is how vardo's were originally intended to be moved.)
If this is really what you want to have, I wouldn't give up on it, just recognize that there are distinct differences in how they tow (and back) and you have to be willing to make those compromises.