have money to burn: have a lot of extra money

→ Since she got her new job, she spends like she has money to burn!

pay through the nose: pay a lot for something

→ You’ll pay through the nose if you go to that fancy new restaurant.

break the bank: be so expensive that it costs almost all you have

→ Karen searched the Internet to find a vacation that wouldn’t break the bank.

feel/look like a million bucks: feel/look great

→ When Lily’s boss loved her project, she felt like a million bucks.
So she bought a new dress, and she looked like a million bucks.

make a mint: make a lot of money

→ The kids made a mint selling lemonade on a hot day.