See, the beauty of the solution suggested is that no one has to write any PHP (You could probably avoid even seeing any, if that's your goal).

Wordpress does what is required out of the box.

In fact, you don't even require a developer to do it. It's a point and click operation of selecting a theme, installing a cache add-on, add an SEO add-on, and hell, there's probably a "office hours" plugin as well.

If the receptionist isn't a technophobe s/he can probably do it themselves.

If you want to assign resources, get a designer in to make it look pretty. Wordpress has everything else covered.