As the previous post noted, Walter is disappointed with Mama's purchase. In his mind, it is another opportunity for him to not be seen as a real man, and to have been emasculated by the women in his life and by life, itself. The fact that the money had been earmarked by Walter for his liquor store with Bobo is one distressing matter for him. Yet, there is an even greater disappointment when the reality dawns on him that he wasn't even consulted before the decision and Mama went ahead and invested his dead father's money without a regard for him. His initial reaction is that as both a dreamer and a man, his hopes had been dashed. In his mind, this would be one more example where life has proven to be a disappointment.
Walter is disappointed and bitter. He had been hoping to use the money to buy a liquor store with some business partners. He accuses his mother of running the family like a tyrant, and he runs out of the house, saying this before he goes:
What you need me to say you done right for? You the head of this family. You run our lives like you want to. It was your money and you did what you wanted with it. So what you need for me to say it was all right for? (Bit- terly, to hurt her as deeply as he knows is possible) So you butchered up a dream of mine you who al- ways talking 'bout your children's dreams . . .