New to awx opensource (few questions)

Hi All,
I am new to awx opensource tower use, I was having few questions on below.

  1. Do we have instance groups and if we have to create instance groups/isolated networks on opensource awx do we have any documentation for the same.
  2. Do we have an option of having HA on kubernetes or docker for the opensource awx? If yes then do we have any blog or any document that would help.
  3. How many hosts can be part of inventory if I have somewhere near to 60k machines that I want to manage will it be possible to use this by having instance groups / HA configured?
  4. We have a development infrastructure where people often have the root access and they add few nfs mounts etc to root login in profile and due to this ssh connection gets hangs and do not terminate even for hours. If we give connection timeout for ssh also it is not working and due to this the job is hanging do we have any option to disconnect these kind of sessions?

Few questions may be silly or might be already answered wanted to get insights from you. Thank you for your help.

Regards,
Naga Sai