Macbook Pro total overkill for her needs IMHO
Vote for Macbook Air 13", will allow her to do the typing and other things not so easy with the iPad, nice camera and speakers for video calls, extremely portable, and SSD drive usually hold up well. If go the used route, lots of good deals out there on used market too but try to buy newer (< 2 years old) due to battery cycles/life (they do wear out and age.) Good luck!