small fortune
US /smɔl ˈfɔr.tʃuːn/
UK /smɔl ˈfɔr.tʃuːn/

1.
상당한 돈, 거금
a large amount of money, often used ironically to mean a surprisingly large or excessive amount
:
•
That antique vase cost a small fortune.
그 골동품 꽃병은 상당한 돈이 들었다.
•
You'll pay a small fortune for a house in this neighborhood.
이 동네 집은 상당한 돈을 지불해야 할 거야.