Loud Rattle noise when starting a Cold Engine. How much is it to fix?

What is your question?

Every morning when i start my 2013 CRV engine , it makes an embarrassing loud rattling noise, and i searched online about it and i found out that it needed a VTC valve replacement. I want to confirm if thats the remedy for it and please give me qoute. thanks! What seems to make the problem better or worse? starting Engine cold How long have you had this problem? a few weeks