Complex sentence: Bronson is perhaps best known for the sale of the land to Walt Disney Productions that would later become the grounds of Walt Disney World, in which he sold, "without hesitation" for about $100 per acre.
Split into simpler sentences: Bronson is perhaps best known as the owner of the land Walt Disney Productions purchased that would later become the grounds of Walt Disney World. He sold it "without hesitation" for about $100 per acre.