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.
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.
There is no way a compound containing so much money would not have been filled with a number of surveillance cameras.