Final answer:
Crooks is the character who scoffs at George and Lennie's dream but later wishes to join them in their plan to own a farm in 'Of Mice and Men'.
Step-by-step explanation:
The character who initially scoffed at the prospect of George and Lennie owning their farm but later expresses a desire to join them is Crooks. In John Steinbeck's novel Of Mice and Men, Crooks is a black stable-hand who is skeptical of George and Lennie's dream but becomes momentarily enchanted by the possibility of escaping his loneliness and joining their vision of a better life.