Simplify the following text for a Grade 11 native English-speaking person.
Original: With the development of the London to Brighton mainline railway , however , those in the business soon realized that transporting sheep by train was much more costworthy and easier than using the old roadways .
Simplified: With the development of the London to Brighton mainline railway , however , those in the business soon realized that taking sheep by train was much cheaper and easier than using the old roadways .