(your) bread and butter

This job is my bread and butter, so

a ballpark figure | a ballpark estimate

She gave us a ballpark figure for the cost because she

a nest egg

Kylie has decided she wants a nest egg, so she's

a vested interest

Which type of person is most often accused of corruption involving vested interests in companies?

cook the books | cook the accounts

He cooked the books of his business, and now he

deep pockets

Harold has very deep pockets, and

dirt cheap

If you buy something that's dirt cheap, the quality will probably

easy come, easy go

Pete lost a hundred dollars on a bet, and then said "Oh, well. Easy come, easy go." He wanted us to think that

easy money

Larry was always trying to think of ways to make easy money because he

feather your own nest

Government officials in the Republic of Amoralia feather their own nests by

(your) bread and butter This job is my bread and butter, so