I was a neighbor
I haven't had a chance to see the film yet, but one thing I do know, the Paskowitz family did not always live in a camping truck. For almost a year, they lived in a small rental house by a famous surfing beach on Oahu in Hawaii.
Julliette had a hard life, constantly "barefoot and pregnant" and Dorian could be autocratic, though few ever heard her complain about him or her life.
Doc worked in health clinics occasionally, sometimes making house calls on patients. Many people paid him in fruits and veggies from their yards. He once told me he appreciated that some could only afford giving him food in exchange for services, but noted that others took advantage to avoid paying when they could actually afford it. He needed to buy gas, pay rent and all, same as anyone.
He was passionate about the family eating only natural foods, way ahead of the times,