I guess I could expand on my thoughts a touch...
- You can setup auto feeds via a cron job which populate your site with fresh content weekly, daily or hourly
- Easy to self update
- Cheap (WP is Free and the customization is affordable if you don't want to do it yourself)
- Tons of free Plugins and Widgets which help with search engine relevance, user experience, traffic, etc...
- Free themes which are better than many paid for themes
- Google, Bing, Yahoo LOVE Word Press.
The site I mentioned above (http://www.billremington.com) was launched 3 weeks ago and already has 1300 +/- indexed pages. The Realtor, Bill, has already seen his request for more info increase as well as requests for his newsletters. Yadda yadda yadda.
Anyway, these days you can get all of this done for relatively cheap ($1000+/-) if you do not want to do it yourself. However, and I say this as someone who does and charges for web services like this, you can do it yourself if you have time and the willingness to learn something new.