He’s short on cash.
He’s broke.
His bank account is overdrawn.He’s just scraping by.
He makes minimum wage.
He’s pinching pennies.
He’s scrimping and saving.
She’s very wealthy.
She’s quite well-off.
She’s loaded.She’s filthy rich.
She inherited a fortune.
She’s making a killing.
She’s raking in the cash.
She’s rolling in dough.
#6 and #7 express the idea that the person is trying to conserve money, when they have very little money.