She's going to be using this printer for scanning and printing documents along with photos. Leo likes the Canon Pixma because it's really good for photo printing. They tend to go through ink fairly quickly though, and ink cartridges are fairly expensive.
Another option is the Epson Workforce printer. This is fairly inexpensive and efficient, the complete replacement for cartridges is around $20, but this isn't as good at printing photos. It does work well with iOS though, so she could print from an iPhone or iPad.
She may even want to consider using something else entirely for photo printing, such as Snapfish, where she could order prints instead of printing them herself.