If they’re so out of money that they’re breaking out of signed offers, would you trust them to pay $10,000?
If you are then, I’m sorry to tell but you’ve probably not experienced enough on this topic. Reneg on signed offers 3 days from joining date is a signal for catastrophic problems that are already in motion (not ahead). They’re done.
(Source: Old enough in the industry to have seen 3 recessions.)