We are still in the last ice age. It will end when the caps have completely melted like when the prior ice age ended. 17,000 years ago was the end of the interglacial period within the current ice age.

Build it into a portable device that can measure a persons intelligence from 4 feet away and gradually expand its capabilities over time as the tech improves.

Earth's magnetic field isn't static it is constantly changing. What happens when the static 'magnetic fingerprint' hard coded into the device no longer matches the location it is supposed to represent? To be un-jammable, it has to operate entirely off grid so cannot 'update' itself.

What will actually happen is the money will mysteriously go missing and when asked, shoulders get shrugged and poor accounting gets blamed. End of story.