Buying motorhome was the idea of our lifetime. If you have same in your mind, let me congratulate you from the bottom of my heart.
The US is a treasure trove of motorhomes. This type of recreation is very popular here and an excellent infrastructure for this: campgrounds, wide roads, a bunch of national parks, specialty shops, services, parking, etc.
If you are planning a long trip across the American continent, often come here and love to relax in nature, buying a motorhome can be a good investment. And you will have your corner in the USA, even if it is movable, so much the better.