1. He's short on cash.
2. He's broke. (= he has no money)
3. His bank account is overdrawn.
4. He's just scraping by. (= he is just barely surviving on little money)
5. He makes minimum wage. (= he earns the minimum salary)
6. He's pinching pennies.
7. He's scrimping and saving.
8. She's very wealthy.
9. She's quite well-off.
10. She's loaded.
11. She's filthy rich.
12. She inherited a fortune.
13. She's making a killing.
14. She's raking in the cash.
15. 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.

Science Facts
A zookeeper in Germany tried to treat an elephant for constipation with laxative foods and an enema (pumping oil into its anus through a tube). His cure was effective – the elephant produced 90 kilograms (200 pounds) of faeces, which landed on the keeper and suffocated him.      .. More >>