To cost money.
save for a rainy day
To keep some money back for possible expensive problems in the future.
give back
To contribute money, goods, or, especially, services for charitable pu …
money is no object
No price cost is too great to achieve a certain objective; all efforts …
nickel and dime
To charge, or be charged, several unexpected small amounts of money, o …
paisa vasool
bang for the buck; cost-effective, value for money, worthwhile