Remote-Posting functionality added to Wordpress plugin

Hi freelancers, CURRENT CONTEXT Currently, I already have a cron jon plugin built by a previous freelancer. It is a well-built built plugin that works with the cron-job in cPanel to deliver post content from the one central master site to whichever mirror site that is added within the plugin settings page - see screenshots below of 3 pages of the existing plugin. Currently, only ONE cron-job needs to be setup - on the master site itself. How this works it that the central master site would contain posts and it will update similar posts on its mirror sites. It recognizes similar posts based on Wordpress post ID. The cron job only updates the similar posts that are present on the mirror site and does not add any new posts. PROJECT BRIEF Remote Posting: I would like to have the ability to ADD posts and other XML content remotely from my central master site over to the mirror sites. Note that I may need to post post types other than main post type we are dealing with which is the Property custom post type. As a user, these are the steps I would follow: Step 1: Select the post type (Selections are done from a drop down list/menu) Step 2: Select which individual post to remote post (Selections are done from a drop down list/menu) Step 3: Select which mirror/client site to add this individual post to (Selections are done from a drop down list/menu) The effect is like manually exporting the xml content for a particular post type and then importing it onto another site. There are 2 main differences however, that I would like to point out that makes this different from just a standard wordpress xml export/import. In this case, I'm able to a) Remote-post from master site without having to log into the client site (of course, login details will be stored already on master site) b) Being able to carry over only selected posts from a post type instead of exporting and importing everything which will add duplicate entries. You can use a plugin like this as a base [login to view URL] However, in this plugin, it synchronises from a master site (the giver) to the network of clients sites (the receivers) with regards to Wordpress user management only. In our case, it will be synchronisation of primarily the property post type. The awarded freelancer should also help me to setup a cron-job with this plugin. Kindly bid only if you are confident of doing it or have previous experience with cron-jobs. Chat with me here on Freelancer.com to clarify more details. Many Thanks - Sam