creation plugin WordPress to clone site wordpress Master to Slave site rescue

Hello I have Wordpress websites in production which works well without problems online and in production. But sometimes it happens that if the Master server breaks down all my websites are down !!! I don’t want to create a wordpress plugin which is able to create an exact copy on another server called SLAVE which is an exact copy of the MASTER server. Like that if the Master server goes down, I just have to change the IP of the site in the DNS to the slave server. And hop the site continues to function normally until I repair the MASTER site I am looking for a WordPress developer to create a Wordpress plugin to do the following steps: 1) a button which when I click on it: it copies exactly all the files from the MASTER site to the SLIAVE SITE 2) a button that when I click on it: it extracts the database from the master site and copies it to the SLAVE site then imports it on the blank database of the SLAVE server and above all modifies the [login to view URL] file to that it receives the password and host of the SLAVE server (this file must remain the original of wordpress there are just the credantial which changes + host which are entered in the form of the plugin see the shema attached to the project.) 3) a Synchro DB + FILE button, which is used when I change a page of the site image file or database and it makes an exact copy of the DB and a synchronization of the files so that the SLAVE server is always the same as the MASTER site Thank you for respecting the description of this project to the letter if you do something else to me I cannot accept it, I already had a devlopper who did anything I have no time to waste with other person who do what want. I am looking for a serious developer who will not waste my time if you think you cannot do it, thank you for going your way, I have no time to waste .. I am looking for an available developer who is attentive to what I ask and who answers me quickly if you have other current project go your way too, I have no time to waste with very busy developers, I want someone available fast and efficient and serious thank you .. Not serious refrain that's it that's all