With all the cheap options for building template-based do-it-yourself websites, why have it done professionally? I'll boil it down to just two words: "distinctive" and "effective." Those 20 total characters are the difference.
Let's take on Wix websites for a moment. To my eye they all share a generic look. You don't have to look inside the source code to know that you have landed on a Wix website.
As opposed to that paradigm, a custom website will look "distinctive," conveying the idea that your company offers a completely unique value-added proposition. There's no one else quite like you. You are in a class by yourself. Your competitors? A bunch of third-rate wannabees.
You're a future Milwaukee web design customer of ours if you place a value on distinctive. If you don't think that being distinctive matters enough that you are willing to pay for it, you'll go to Wix.com right now.
Be aware though that their websites are not free, as the ads tout. You'll be paying $50 a year for a site that's wallpapered with Wix ads. So really, at the low end of the price range, you are renting space on an Internet billboard. Ad-free Wix websites start at about $110 per year.
Right now, the only add-on app is an e-commerce module. Serious business users will go with the so-called "unlimited" plan at $150 per year. First-year domain fees are covered, but you will pay for subsequent renewals.