I would go for: miserly or miser

Mr Scorge is a miser

His miserly great-uncle proved to be worth nearly £1 million

She was too miserly to turn the light on.

It is common enought in my expereince as a native British English speaker.

OED defines it as: noun: miser; plural noun: misers

a person who hoards wealth and spends as little money as possible.
"a typical miser, he hid his money in the house in various places"

From Wikipedia: A miser /ˈmaɪzər/ is a person who is reluctant to spend, sometimes to the point of forgoing even basic comforts and some necessities, in order to hoard money or other possessions.[1] Although the word is sometimes used loosely to characterise anyone who is mean with their money, if such behaviour is not accompanied by taking delight in what is saved, it is not properly miserly.

While this isn't defined as always costing more in the long run, it is refusing to spend money to such an extent as to cause suffering.

There are quite a few examples of the words use in stories: Scroge from A Christmas Carol, Scroge McDuck, Fraser in the BBC sit-com Dad's Army, the evil uncle in the book Kidnaped: Ebenezer Balfour.

I would go for: miserly or miser

• Mr Scorge is a miser
• His miserly great-uncle proved to be worth nearly £1 million
• She was too miserly to turn the light on.

It is common enought in my expereince as a native British English speaker.

The Oxford Dictionary of English defines it as:

noun: miser; plural noun: misers

a person who hoards wealth and spends as little money as possible.
"a typical miser, he hid his money in the house in various places"

From Wikipedia:

A miser /ˈmaɪzər/ is a person who is reluctant to spend, sometimes to the point of forgoing even basic comforts and some necessities, in order to hoard money or other possessions. Although the word is sometimes used loosely to characterise anyone who is mean with their money, if such behaviour is not accompanied by taking delight in what is saved, it is not properly miserly.

While this isn't defined as always costing more in the long run, it is refusing to spend money to such an extent as to cause suffering.

There are quite a few examples of the words use in stories: Scrooge from A Christmas Carol, Scrooge McDuck, Fraser in the BBC sit-com Dad's Army, the evil uncle in the book Kidnaped: Ebenezer Balfour.

I would go for: miserly or miser

Mr Scorge is a miser

His miserly great-uncle proved to be worth nearly £1 million

She was too miserly to turn the light on.

It is common enought in my expereince as a native British English speaker.

OED defines it as: noun: miser; plural noun: misers

a person who hoards wealth and spends as little money as possible.
"a typical miser, he hid his money in the house in various places"

From Wikipedia: A miser /ˈmaɪzər/ is a person who is reluctant to spend, sometimes to the point of forgoing even basic comforts and some necessities, in order to hoard money or other possessions.[1] Although the word is sometimes used loosely to characterise anyone who is mean with their money, if such behaviour is not accompanied by taking delight in what is saved, it is not properly miserly.

While this isn't defined as always costing more in the long run, it is refusing to spend money to such an extent as to cause suffering.

I would go for: miserly or miser

Mr Scorge is a miser

His miserly great-uncle proved to be worth nearly £1 million

She was too miserly to turn the light on.

It is common enought in my expereince as a native British English speaker.

OED defines it as: noun: miser; plural noun: misers

a person who hoards wealth and spends as little money as possible.
"a typical miser, he hid his money in the house in various places"

From Wikipedia: A miser /ˈmaɪzər/ is a person who is reluctant to spend, sometimes to the point of forgoing even basic comforts and some necessities, in order to hoard money or other possessions.[1] Although the word is sometimes used loosely to characterise anyone who is mean with their money, if such behaviour is not accompanied by taking delight in what is saved, it is not properly miserly.

While this isn't defined as always costing more in the long run, it is refusing to spend money to such an extent as to cause suffering.

There are quite a few examples of the words use in stories: Scroge from A Christmas Carol, Scroge McDuck, Fraser in the BBC sit-com Dad's Army, the evil uncle in the book Kidnaped: Ebenezer Balfour.