Hello there!
Technically, it should be simple enough. You export your product catalog into XML, or TXT file and submit it periodically to the Merchant center.
Now, without knowing what kind of website you have, what it is build upon and what kind of data export features are available, I can't give you the realistic price offer and timing.
I assume you want it to be all automatic, from start to finish. For that I need much more details.
Let me know if you want to discuss this.
Cheers,
Denis