After receiving Baba's discouraging reply about his trade venture, what were Damu Anna's specific thoughts and regrets?

Damu Anna was utterly crestfallen upon reading Baba's reply. The source material in Chapter 25 details his profound regret and the collapse of his ambitions. His mind had built a kingdom of wealth that melted away instantly. He lamented, "I would have earned one lakh now, and put half a lakh on interest. I would have immediately become a millionaire money-lender and lived happily in Nagar." He felt that writing the letter was a foolish mistake that caused his own harm, comparing his action to having "kicked away the served plate myself."