Final answer:
The lack of money makes the boys doubt the achievability of their dreams and affects their motivation.
Step-by-step explanation:
The lack of money affects the boys in the excerpt by making them believe that their goals are too difficult to achieve. They express jealousy towards students who are going to college and wonder what kind of business they could pursue given their limited options in their community. The boys' lack of financial resources dampens their motivation and makes them skeptical about the feasibility of their dreams.