such a big family and only 2 cars...
I would not want to be a neighbor of the Waltons in real life. I know they are pretty self sufficient, but when a family of that size has only 1 car for many years, then gets only one more for many more years, in real life they would be bumming rides all over the place.
John boy had to take Jason and Erin to work all the time. Jason inherited the car after John boy goes to New York. Ben was always either driving the old truck or using Cindy's car once he married her. The only reason Mary Ellen had a vehicle is because she used Curt's ambulance.
I had a couple of cousins that didn't have cars when we were teenagers. Every time I went to their house they were either asking to borrow my car or asking me to drive them to the store.