Not sure how helpful this article really is in drawing a distinction between blogs and websites. Many blogs can also be websites (Wordpress being a case in point), while websites ought to be updated with regular content.

Furthermore, there are lots of options today for building a website without needing to know about code (I use Wix for instance), so it doesn't have to be an expensive venture involving someone else.

Do both. More blogs could do with a decent contact/about page. More websites could do with a blog giving readers an insight into the writer's world.