They hope to bail out their company. <-- PERFECT!
He balanced the book about his cash carefully.<-- He balanced the books. [cash or money in any other form is implied ]
On holiday I have banker`s hours at work.<-- I have bankers hours. [means to work short days; has nothing to do with holidays ]
His friend blew a deal and lost their money.< PERFECT!
The boys in the backroom organised a Charity concert last Sunday. <--SORRY, NOT SURE WHAT IDIOM YOU ARE TRYING TO EMPLOY.