There is no way a gangster who was in prison for money laundering or similar crimes would ever be allowed to take college courses in Business Finance.
There is no way a compound containing so much money would not have been filled with a number of surveillance cameras.
Why Sylvain did not called Alexandre to tell him that he was moving the money ? Or just tell him in person when they first went inside the storage facility.
Who called the cops ? There was nobody around and most of the shots were fired inside.