It might be worth thinking twice about buying a new laptop. What you've said about your mother's computer requirements leads me to believe that an iPad would be the perfect choice for her.
I take mine with me wherever I go, it has a micro-SIM that gives me internet access wherever there's a mobile phone signal. I can work if I need to,or watch TV, play music, read books, or do just about anything that I can do on a laptop. If the text I'm reading is a little small I can enlarge it at a touch.
I think it's worth some serious consideration.