Corrected entry: Someone as high in the police rankings as Hoffman couldn't possibly set up all the elaborate traps as well as kidnap all the victims without noticeably neglecting his law enforcement duties. He rushes the main traps of this film into motion, but the engineering on them alone would take days if not weeks to accomplish.
Phaneron
15th Nov 2015
Correction: Hoffman is following the Jigsaw case on it's own. No other work. There is plenty of time for him to kidnap the victims. As for the engineering part, we know he has been planning this for sometime as, as shown in other films, he's been working with Jigsaw from shortly after the events of Saw. So a few years.
Ssiscool ★