Jeanne says the family left the camp “in style.” describe this.
The answer that you are looking for comes at the very beginning of Chapter 19. Basically, all this means is that they are not going to take the bus back to Los Angeles like everyone else. Papa is going to go and buy a car so that they can leave in style.
As it turns out, he would have done a lot better if he would have saved his money and gone on the bus. He buys a Nash sedan and the thing is pretty junky. Jeanne says that the car broke down about every 100 miles.