If you have a comcast router, make sure it isn't broadcasting a public Comcast wifi or she can just connect to that. You have to ask comcast to turn that off if you do.
I installed a Swann system at my inlaws, running cable and power to the cameras was a pain and I don't like the interface. At my house I have turret, dome, and box POE cameras. I know you don't want to cobble things together, but I would go POE again every time. There are POE NVRs, I however use a cheap Dell desktop and POE network switches. For recording I use Blue Iris, one time purchase to use with up to 64 cameras. The app isn't great, but notifies you if you set it up that way, unfortunately it is another $10 charge. So the $$$ adds up quickly With BI I can open any computer in my home, or my smart tv, and look at my cameras. While out I use the app. I started with the VPN route, but I changing all the passwords on the cameras, blocking them from the internet directly, and not recording my bathroom is worth the possible risk. Attached is a shot from the BI web browser interface, clicking on a desktop shortcut pops it up.
LTS cameras are rebranded Hikvision, Uniview are rebranded Dahua (I think). I like my low hanging dome at my front door, but if you are hanging them high enough I would get turrets since there is less IR bleed. The IR attracts bugs, you will get plenty of false alerts any route you go, circular bullets are worse for this since the lens is surround by the LEDS.