I specialize in WordPress and HTML mostly, since that's what my clients preferred, along with hosting!
Do you have any other special offer? For example, do you offer custom plugin (not paid plugin) or custom theme (not paid theme)? If you only specialize in WordPress and HTML, I don't think you should charge 280 (I assume) USD. WordPress is a very user-friendly content management system and anyone with basic technology know-how can create a professional looking site in the matter of minute - not to mention there is a lot good-looking free theme and plugins too.
Unless you can offer custom service*, you shouldn't charge anyone 280 USD for such a simple task.
I could actually do that for free if I have time for someone I trust. Others might only charge 10 USD or so for simple WordPress set-up with free plugins and themes. Hosting on the other hand, NameCheap's 19.88 / yr (first year promotion) is already more than enough for a small business website.
* by custom service, I mean that you write custom plugins and themes (or maybe modify free theme(s) to an extend). If you are using that 280 USD to bundle others paid theme and plugins, one can actually buy that themselves at a lower cost.
