I don't want to lend my mom $100-$200 at least once every week
What's the reason you do it in the first place?
That's always what she wants to do, she always gets money from other people and she doesn't care how to make a living.
You will have to set boundaries with your mom. Tell her it is okay every once in while but you also need to save your money.
I want to make her think once in a while. She's a penny pincher.
This is an unfortunate situation to be in with family members. You can't be expected to pay her way through life. You will have to sit down and talk to your mom about the situation before it gets worse.