Q:

How to create template of guides in Illustrator which appears with every document I open?

So, I am working on a multiple page pdf. I need to setup margins on each side of the page using guides. There are 300+ pages and I am working on each page at a time. I don't want to add guides in each page manually. Even coping the guides from one page to another is tedious and frustrating. Is there any way to set up the guides in way that appears every time I open a new page? If not guides is there any way to  get around this problem? 

A:

Maybe they don't have access to InDesign.  If you have to use Illustrator, I'd say  first create ALL the artboards you need (not completely necessary but might as well). Then go to board #1 and create the Guide(s) you want. After you're done, highlight the guides and "Cut", then use "Paste on All Artboards". That should add your margins to every page in exact same spot, then you can "paste in place" for any extra artboards created afterwards. If I'm understanding this correctly. 
Forgot to add. Once you have your template created, look into saving as an .AIT file (Illustrator Template). Which you can then launch whenever you'd like!

