RVing is a wonderful way to travel as you see the country. It is NOT an inexpensive way to travel. There is annual maintenance, tire replacement, overnight costs, insurance and more. Towing slows down the speed at which you can safely/legally travel whether a towed car or Trailer. That many people in one RV will allow for little to no privacy for anyone. Storage for clothing and more would need to be carefully looked at in any RV/trailer you might consider.
If long distances are in your future, driving slower only increases the required time while towing/RVing dramatically increases fuel costs. Many class A Mhs get 8-10 mpg on a good day with no mountains to cross. We use 50MPH as out time estimator for our travel which includes short rest stops/quick lunch in our travel day.
My family loved our little trailers we had. I have such good memories of our adventures. Your family may also love joining the RVing world. Just think very carefully about why and how this would it work for you all. Go wander through some an envision how the space and seating would work for you when camped and when travelling. Good luck!!!