I have been managing several servers for over 4 years now...myself...no sys admin..i am the sys admin...and i have had things break and i fix them...i troubleshoot them and get the problems fixed.Echoing above. You should really hire someone to design and manage your infrastructure. That was like asking if your IP address is the same as your password. Strongly suggest you seek a managed solution.
Just because i ask certain questions doesn't mean much...it is what happened when one is learning things without anyone around to physically explain things to you....you tend to ask those questions online or find answers online..and the problems with articles is once written that is it...no one to ask anything...why forums are much better.
I already have my RHCSA certification...about to take the RHCE in a month or so...2 months max..and going for the CCNA around the same time....just some info for you