Complex sentence: Plant estimates that capital maintenance costs at the new stadium will be no more than $80 million after 30 years--less than half of the $150 million in capital maintenance needed for Turner Field after 17 years.
Split into simpler sentences: Plant estimates that capital maintenance costs at the new stadium will be no more than $80 million after 30 years. That is significantly less than the $150 million in capital maintenance needed for Turner Field after 17 years.