Police are being independently investigated after detectives botched a rape trial late last year.
The man appeared in the Auckland High Court in November on eight charges, instead of the 22 he was meant to be tried on.
Prosecutors had to apply to have 13 charges heard in a separate trial after it was discovered the man's alleged victims - five women and five men - hadn't been told he had been arrested.
This meant the victims had no chance to prepare for the trial.
The length and cost of jury trials varies considerably, but the Ministry of Justice estimated the average cost of a jury trial was $15,480 in 2007. A spokesman said this week there was no more recent estimate.