Kira compares wooden and steel roller coasters, discusses the struggle of the lack of data on roller coaster costs, and examines the varying intensities of wooden and steel coasters.

https://rcdb.com/

https://grokipedia.com/page/Shivering_Timbers#history

https://grokipedia.com/page/Wildfire_(Silver_Dollar_City)#trains-and-technical-specifications

https://www.carneerides.com/wood-roller-coaster-maintenance/#maintenance-costs-wood-vs-steel