extremely poor or reluctant to spend money
penurious - poor
The formal word ‘penurious’ originally expressed the state of being flat broke. While it still does, in more recent times it has come to be more frequently used to describe a person who has a general reluctance to part with possessions or spend money. Most commonly seen in written English.
I wouldn’t take the job David’s offering you. He’s known to be a penurious employer who underpays most of his staff.
The historic building fell into a state of disrepair due to the penuriousness of its various owners over the years.
Having been homeless for a period of his life, Robert had a very good idea of what it's like to live penuriously.