Things to consider with RV
With the price of fuel in the US right now, there are a lot of RVs for sale. It might be a good time to get a good price. Although that could change rapidly if the price of fuel falls. And then, when it comes time to sell at the end of your trip, this could factor into what you get for it.
You might want to consider a Class B for just a year on the road. Yeah, it's smaller but they are really laid out great. You will use far less fuel. And they eliminate the need for a toad. And you can always purchase a "screen house" for those times when you are spending a few days in a campground and want a bit more space to stretch out in.