Complex sentence: The creation of the miniature of the ship caused the episode to go over budget by more than $12,000, having been set the target of $180,000, "Space Seed" actually cost a total of $197,262.
Split into simpler sentences: The creation of the ship miniature caused the episode to go over budget by more than $12,000. Having set the target of $180,000, "Space Seed" actually cost a total of $197,262.