If you want to do a blog about what you are doing then look at a free blog from blogger, wordpress or tumblr to name a few.
You can change the default template to something more like a webpage than a journal, and set links down the side.

These days facebook, twitter and instagram etc are possibly better at creating something customers will return to than a traditional website - or you could incorporate links to social media in a simple page with an easily remembered address.

Most businesses with an online presence probably ought to have a domain name if only for 'proper' email like info(at)myfarm.com.
You can make a domain (in that example myfarm.com) point to any web page e.g. your hypothetical blog without need to buy web hosting.

Bear in mind from the start it's easy to create a poor first impression, simpel tings like correct spelling are important.