Although I do believe in using designers to produce quality header graphics for your site, I am strongly against hiring a Web Site designer to build your whole site, and here's why.
You may spend $1000 or more to have a site designed, and there is no guarantee that you will be completely satisfied with the results.
You are also at the mercy of the designer's availability to revise or update your site. This poses a major drawback to content publishing affiliates who should regularly add new articles and products to their sites.
Imagine how disappointed you would be to miss an opportunity to promote a super deal because you couldn't get in touch with your webmaster?
For example, if a Merchant contacted you with a REALLY good time-limited offer that you had to get out to your customers right away; you don't have time to wait until your web designer returns your phone call, or comes back from his 3-week vacation.
Then, when he does finally get in touch, you will have to EXPLAIN where to get the graphics, the page you want it posted on, and so on and so forth.
Blah, blah, BLAH!
Missed opportunities mean lost Revenue, so let's look at a better option for building your site.