Hi. I've been a sys admin for past 14 years. I have extensive knowledge of bash, php, databses, the linux in general, and many other things. I can do this for you, although there are quite a few operations involved (according to your 'summary') so i'm not 100 % sure about the price but minimum would be $500 bucks, and time to fully make it AND test it under various conditions would be between 7 and 10 days.
I can make this for you, i put a bid of $500 usd but I might ask you for a bonus as well depending on further details. Just giving you heads up.
Anyway, if you're interested.. message me and we can talk some more.
Thanks,
Alek