Time spent planning and executing a heist is time not spent in a casino. Doing both lowers profit while dramatically increasing risk.
-and the risk is
enormous. Getting caught, or even just accused plausibly enough for the other motivated Kage to agree, would be devastating. At the very least Leaf's bond would be forfeit. It could probably be interpreted as an act of war. Hiashi gets the hat, everybody dies.
I've got nothing in principle against going out and conducting a heist under ordinary conditions,
but this is not the time. About the best thing I can say for the idea is that the fact that Hazou is under constant jounin guard means that either Jiraiya will find out in time to stop it, or Hazou slipping the tail will trigger an emergency response to find him, at which point Jiraiya will find out in time to stop it. Jiraiya will then be forced to protect the future credibility of his threats by yanking Hazou's fingernails out and throwing him in the midden.
Whats the general attitude towards hiring other villages ninja for help in illicit activities?
I know some social specs on the other continent that might be down for this sort of thing.
(I can at least dream of some massive Ocean's Eleven plot, okay?)
Let's not give foreign powers massive blackmail material during a historic tipping point at an international summit?
I will observe that any mission to get these things are not best suited for us.
Why? Because we have horrid Steath. Like, the worst.
This as well. Like, if the team wanted to make a thunder run through a hostile foreign city and happen to pick some goodies out of the rubble along the way, that'd be one thing, but they're less sneaky than they are "ninja can't catch you if you are constantly surrounded by a three-block radius of 200dB poison glass vapor and building-sized armored monstrosities."
Actually, I would quite enjoy saying, "Kagome, at this time tomorrow we need every ninja within an hour's travel of that city to be as distracted as possible. Deniability and collateral damage are not a concern." He'd probably have to invent a whole new happy dance.