George and Lennie dream of having their own house one day so that they wont have to live like the other workers who only care about themselves.
Candy overhears the conversation about the dream and immediately takes his chance to escape life on the ranch, he feels desperate enough to offer all the money he has and to work cleaning and tending to the garden.
The Dream is Dead
Lennie tells Crooks about the dream and he too sees it as an opportunity to leave the ranch where he is treated differently and he feels like an outcast. He offers to do yard work for them but later on when he realizes that George probably wouldn't let him come with them, he tells Candy that he was only joking
A Movie Star
When Lennie tells Crooks about the dream, he tells him that every worker thinks hes gonna get a chance to escape that life and that most end up wasting every paycheck on useless things.
After Lennie kills Curley's wife, Candy asks George about the house and George laughs the idea off and tells him that the dream was practically impossible, that he felt stupid for believing it could work.
Curley's wife rants to Lennie about how she had the opportunity to live in the city and make movies but she married Curley to spite her mother but ended up in a hopeless situation she couldn't leave and lost her chance.