Welcome to the forum.
Please read the
cliff notes and other items in the
wiki. The wiki is in the blue bar at the top of the page.
Read How to Secure Your Network (Don't Get Hacked!) in the wiki also.
Use Dahua starlight cameras or Hikvision darkfighter cameras or ICPT Night eye cameras (
https://store.ipcamtalk.com/) if you need good low light cameras.
Do not use Wifi cameras
Read,study,plan before spending money ..... plan plan plan