I know it's a Saw movie and we shouldn't question the logic here
But how in the holy fuck is kramer able to set all this shit up so fast? Presumably, he only planned to be in Mexico for a week, yet when he needed to shift into game mode, he's able to set up one of his elaborate kill buildings in like two days!
Did nobody notice the gringo cancer patient carrying large metal planks and cables into an abandon factory? Is chemical nerve agent just that easy to buy south of the border? At some point, I want a breakdown of the logistics of how all this works!