Major Plot holes - Walt keeping all his money in one spot
nobody with that amount of money would ever do something like that. Even a teenager would be smart enough to spread out hiding spots, let alone a genius like Walt.
plenty can go wrong having all your money in one place.
Then when Jesse makes the call about finding 7 barrels he would know he's lying turncoat and just hang up or use coded message to threaten Brock. He could say "Brock and Jack should meet soon, don't you think Jesse? Do you think it's time they made acquaintance?" Then Jesse gets the message and has to keep his mouth shut.