Spend less money than usual
Tighten your belt
Pay too much money for smth
Pay through the nose (for smth)
Save
Put aside
Not have very much money
Be hard up
Make a lot of money
Make a killing
Have a lot of money
Be well off
Spend a lot of money
Splash out (on smth)
Charge smb too much money
Rip smb off
Cost a lot of money
Cost a fortune
Be not at all expensive
Be dirt cheap