So my father wants to trade in his mini 4 for a new iPad. He wants to go with the Pro rather than the low end iPad because he wants to get something that has 256gb of storage to store his family history documents and a lot of his medical apps but doesn't want to pay as much for the refurbished 10.5 pro. Is the 9.7 pro still a good purchase in anyone's opinion in 2018/2019? I want him to get something decent but affordable.