Questions on 2nd site installation

I currently have a C7 and want to install a new system in my 2nd home. I have a few questions:

  1. If I buy the C8, can I import my current configuration into the new unit to retain all settings and apps that I currently use. I would delete all of the devices as those would no longer be applicable.
  2. I currently have a Ring Keypad G2 that I use to arm/disarm the system. Is there any other device I could use instead?
  3. Any suggestions on doorbells like the Rings? My rings detect motion but suddenly stopped integrating with Hubitat to turn lights on.
  4. Are there any cameras that integrate with Hubitat? I have a number of Alfred cameras that are great but do not integrate.

Thanks