synchronizing content

I was told to create a mobile version of my uncle’s site. I explained to him that it would be much easier to make his site Responsive rather than making another (mobile) site with similiar content, but he keep rejecting my idea (not really sure what his reason is).

And so here I am… trying to do something I’ve never done before…

Is it possible to synchronize the contents between 2 sites? (in this case… synchronizing the contents, comments included, between example.com and mobile.example.com)

Thank You.