Setting up a web site

My sister wants to set up a web site for her interior design business. What's the best/simplest/cheapest way to do that? First, she wants a domain name; what's a good registrar? (I've never owned a domain name myself.) Her site will be pretty simple, probably just a few static pages, with a bunch of photos that she will add to/replace over time. Some sort of site-maker service would be fine, I think, like Google Sites, or even just Blogger or WordPress maybe? Any other ideas?