Why would George tell Lennie about the piece of land if they weren't going to get it?
Sometimes it's nice to just think "what if." Though George knows that he and Lennie will probably never get their own farm; however, he also knows the value of dreaming and therefore he continuously tells Lennie about the farm in hopes of keeping the dream alive.
Lennie said, “Tell about that place, George.”
“I jus’ tol’ you, jus’ las’ night.”
“Go on—tell again, George.”
“Well, it’s ten acres,” said George. “Got a little win’mill. Got a little shack on it, an’ a chicken run. Got a kitchen, orchard, cherries, apples, peaches, ‘cots, nuts, got a few berries. They’s a place for alfalfa and plenty water to flood it. They’s a pig pen—” “An’ rabbits, George.” “No place for rabbits now, but I could easy build a few hutches and you could feed alfalfa to the rabbits.”
Here, Lennie in a childlike voice, asks George to once again tell him about the farm. We can tell that Lennie has heard the story many, many times as he fills in details and asks questions whose answers he already knows.
We see the other characters need this desire to dream about a better life. In Chapter three, George once again tells Lennie about the farm. This time Candy hears the story is immediately drawn into the dream. He offers George $350 to buy into the farm (and into their dream). This represents all of his money.
That’s why they give me a job swampin’. An’ they give me two hunderd an’ fifty dollars ‘cause I los’ my hand. An’ I got fifty more saved up right in the bank, right now. Tha’s three hunderd, and I got fifty more comin’ the end a the month. Tell you what—” He leaned forward eagerly. “S’pose I went in with you guys. Tha’s three hunderd an’ fifty bucks I’d put in. I ain’t much good, but I could cook and tend the chickens and hoe the garden some. How’d that be?