In addition:
Hogu's Love - male lead is a struggling manhwa writer who lives with his parents and doesnt seem to have success in anything
Ugly alert - male lead is the bread winner who raised his stepsibling and sibling. Parents are dead and he had to work all kinds of odd jobs to fed everyone, then he was incarcerated. When he came put of jail he had no home.
Lovers in prague - male lead is an ordinary street smart detective. He is not really poor but he is very far from well off, especially opposite the female lead who was the daughter of the president
Last Match - very very old drama, released in 1994 and tells a story of poor college students tht had to give up his dreams cause he had to work, but he ended up finding his dream and passion in basketball again
Sangdo lets go to school - the guy is poor and jailed. He also has no permanent job.
Mr.Duke - very old drama, where the male lead delivers water to restaurants
Happiness - the two guys who feel in love with the daughters of a conglomarate businessman are both pretty poor. One is an ordinary salary man while the other is a nomad orphaned poor boxer
Super rookie - male lead is dishevelled and unskilled and most importantly unemployed
couple or trouble - ML is like a mechanic/plumber do all things when you call him kind of guy and lives quite below averga elifestyle with a few orphaned kids
shup up flowerr boy band - ML and his friends are quite poor and they made a band and get recognized
Others dramas: padam padam, east of eden, cheer up mr kim, innocent man, i am sorry i love you, dream high, hello god, miss korea, please take care of young lady, king of ambition
Just wanna point out some things:
Healer - ML was originally poora nd orphaned but by the time the story started he only has to work a couple mor jobs to be able to buy an island in the tropic. So technically he is quite rich.
Witch romance - ML is actually a chaebol who has taken some time off from his medical studies and wants to live on his own away from all his father money because of a tragedy from his life. So he is really a disguised chaebol
Queen inhyuns man - he is a son of a noble, but his support for the deposed queen inhyun had him be demoted in position. While in the future, anytime he sells the family treasure which was given from aking, he gets tons of money he was able to buy a car and house. Rhus both timeline he is quite rich.
Because its my first life - i dont think he is poor. To be able take a loan for that apartment of his, says that he has a stable job as compared the usual poor salary man