In the US if you show a 6 month gap you wont be employable.
I took a 2 year break, after working 70 hour weeks for 8 years.
In my off time I played video games, lazed around and did nothing, right up to about a month before I applied for a new job. Started studying the latest release of the OS I had been an admin for before, and went in for an interview.
Landed the first job I applied for.
Most reasonable places will sit you down and ask questions about the OS, and what you would you do if certain errors happened. Good places will put you in front of a keyboard, and let you show them, since a lot of admin work is related to you typing and running commands, that aren't exactly processed through the speech centers.
if you are good, and don't freeze up in interviews, taking time off, learning new stuff, and getting a new job isn't that hard. Depending on what job market you are looking in.