钱不是问题
Money is no object.
Expense is no object.

Choose whatever you like from the menu. It’s your birthday so money is no object.
菜单上的东西你喜欢啥就点啥。今天是你的生日，钱不是问题。

… is no object.
...不是问题。
I am ready to travel anywhere. Distance is no object.
我准备好到处旅行了。距离不是问题。


Pour Money down the Drain
挥霍钱财
He’s from a poor family. But he is always pouring money down the drain.
他的家庭并不富裕。但是他花钱如流水。

Save sth. for a rainy day
未雨绸缪
You don't make much money and your son is growing up. So you’d better save some money for a rainy day.
你赚的不多，而且你的儿子正在长大。所以你最好存点钱，早做打算。

不理智的人难聚财
A fool and his money are soon parted.
A: I can't believe Danny had just spent all his money on a new car! The money is his college tuition.
Danny拿自己所有的钱去买了辆新车，真不敢相信。那可是他的大学学费啊。
B: Well, a fool and his money are soon parted!
不理智的人难聚财啊。