The showdown between the Wrights and Rineharts over billions of dollars of mining royalties has attracted a galaxy of legal talent to the West Australian Supreme Court at a cost of at least $250,000 a day.

The seven parties involved have engaged 27 barristers and forced the court to undertake extensive renovations to Courtroom No. 42, including ripping out rows of public seating to accommodate five rows of five-long desks.