Help with Unraid to Remote Unraid Backup - Waking and Shutting down Remote Server too!

Hi

First off, loving Unraid!  So much so I want to get a second server to use for remote backups.  I have searched around for answers to my problems but I am confused by it all and whether what I want to do is possible.

So the premise.  I currently have an Unraid server (local) and I am want to set up a second server remotely.  I gather it is possible to then backup from the local to the remote.  I have seen things about using Rsync.  Although this is new to me.  I currently use Duplicati to backup to the cloud and using this for remote backups would be great.  The biggest problem I think I am going to have is wanting to turn on and shutdown the remote server.  I am unsure about the solutions for this.  WOL possible?  But I think my remote server won't be connected via ethernet.  So don't know if this works on Wifi.  A solution not involving the router might be best, as I read they sometimes don't work.  Some sort of Smart Plug maybe and getting the server to boot when supplied power? 

So my questions are;

1 - Can I use Duplicati?  Is it the best solution?  I would like for the data to be encrypted on the remote side.

2 - Can I wake up the remote server using Wifi?  Or are there other solutions like the Smart Plug that would work?  Any suggested products would be great.  I am in the UK if it makes a difference.

Any other tips or advice would be welcome. 

Many thanks

Celeggur