I wouldn't use an RV unless someone else was paying for all of the maintenance. RVs are very poorly built and many require maintenance right out of the showroom including RVs well into the six figures. With a van conversion, you mostly have to only worry about car-like maintenance and repairs and with a van, most repair places will work on them. With an RV, you usually have to take them to an RV repair place which there are fewer of so they charge a lot more and they have long waiting lists. I have had friends for example whose generators went out and the earliest they could get them repaired at any RV place was 4-8 weeks.