Sure, I can hear the resentment in the OP's post about how the siblings are not being treated equal by the parent. But there's a lot of info we don't know, like why. Remember school reading tests where you had a short story to read and then got tested on your understanding? I feel like this post is like that.

Growing up, nothing was equal with my sisters. And raising my sons, nothing was equal, either. It's not possible to have all things be equal. Situations are just different. And that has nothing to do with playing favorites. It wasn't like that, it was just some kids get this, some kids get that.

One of my sons got a full college scholarship, the other one got none. What should happen there?

A family is a team.

I understand the OP's point that she wants to save the $100 so that she can move out on her own. That's a good point. If I was the mother, didn't need the $100, and wanted my daughter to move out, I would help her save that money so she could get out of my house. But we don't know the whole situation.