Hi there, my name is Adam.
I need to take a look at your server to discuss details and to talk about price - it highly depends on how many websites do you have, what kind of (CMS, -commerce, custom scripts) etc.
I'm server admin in my full-time job and security specialist as freelancer (not only on freelancer.com)
OK, let me know if you are interested in and we can talk about the details on chat :)
Regards,
Adam