Coffee Prince
Live Up to Your Name - technically, since he can't spend his wealth.
I Hear Your Voice - has a nice apartment and is set financially due to a life insurance pay out, but spends most of the drama living with others who are not as well off.
My Secret Romance - briefly at the point when the main leads meet.
It's Okay That's Love - famous author has to lie low after a scandal and moves into a house he owns + gains three roommates.