Sounds like a plan!
I know what you mean about the money situation. During Christmas ask for certain books from you friends that you know your mom will enjoy also. Or ask your friends if you can borrow a book...if it looks like something your mom would like...have her borrow it.
Some of us don't have Christian friends, I know. So, ask around on the forum for some good books with certain plots that are by Christian authors. Then see if the library carries any of them. Tell your mother:
I heard of this book that is supposed to be really good! You might want to check it out.
Keep on showing your love!