We'll have to be careful with money but that doesn't mean (that) we can't enjoy ourselves.

我们必须精打细算，可也并不是说我们就不能过得快乐。

《牛津词典》

Kids today have a lot more than I ever did but they don't have any idea what it means to earn money and be careful with money, they just know how to spend it.

现在的小孩拥有的东西比我当时多得多，但是他们并不懂得什么叫做挣钱，什么叫做理财，他们只知道花钱。

youdao

Be careful with that —it cost a lot of money.

小心别弄坏那东西，它可值钱了。

《牛津词典》

The Treasury is right to be careful with public money.

ECONOMIST: Gambling with public money

Labour voted against the proposal of their former leader - on the grounds that it was important to be careful with taxpayers' money at a difficult time - and voted with more than 30 Tory rebels.

BBC: Eurozone: Osborne v new coalition?

And, because people would be spending their own money, most of them would be more careful with it.

FORBES: Conservatives Are Missing The Point On Welfare Reform