Complex sentence: They came to farm a total of 30 acres (121,000 m²) in modern day Pitt Town Bottoms to help overcome the desperate need for good farming land and food in the new colony.
Split into simpler sentences: They came to farm a total of 30 acres (12.1 hectares) in what is now Pitt Town Bottoms. They needed good farming land to help overcome the desperate need for food in the new colony.