deer2ker wrote:
I would get the D7200 because she would be able to share all of your wonderful D850 lenses with autofocus! No brainer for me and she would also have that camera for life as she would have to be very proficient to outgrow it :D
If you didn't have a Nikon already, I would have suggested a small mirrorless (I have a Fuji and love it) but the D7200 also has faster focus than the D5500/5600 (I have the D5500 and it is a great camera!) and would be able to handle a moving toddler. I almost traded up to the D7200 though for the added benefit of being able to use older Nikon lenses as well as the FF lenses. I think she would love it! Also, consider buying a used D7200 from KEH, Lensrental, B&H and other "reputable" dealers - it will allow you to get all you need above.