What's a word that means a person tries to find an easier, cheaper way? [duplicate]
Solution 1:
She is being a niggard.
Example:
A niggardly tip to a waiter.
It means that the tip was ungenerous or scanty.
Solution 2:
I would say that your mother is economical:
marked by careful, efficient, and prudent use of resources : an economical shopper
[Merriam-Webster Dictionary]
Resources could be extended to include things like time and money