I have a few cameras.
None of mine are wifi - although I have an indoor camera that is triggered when the outdoor ones are triggered. I can see it on my iPad.
My current cameras are from Lidl and Aldi.
Here are some of my videos
https://www.youtube.com/channel/UCy8fBZdv_0itvMI8px6smIw
My original camera - Ltlacorn - had the option to add a mobile sim card and it could then the images. I never made use of that option - too mean to pay for a mobile sim and its costs, and poor mobile area.
I would recommend that she goes for one with 3 sensors on it eg. pointing 11, 12 and 1 o'clock.
The figures you have quoted are good - but you can set tbe camera to work at lower resolutions.
If you don't have a card reader, you can still connect the camera by usb, and view them on tv if you have the phono socket on tv.