I have always heard from my mentor that a person's work must be done by professionals only. Just focus on one job and be perfect in that instead of doing multiple jobs. And I want to state that the design of the website must be created by a web designer. If the design is being been prepared by a third person or a developer, It won't do the job with perfection.

Reasons you should hire a web designer instead of a developer or a normal designer

1. A designer has a lot more practice than a normal person or a developer.
2. He/She can do the job in less than half the time.
3. The design will speak for itself.

   Things a designer must use

4. Bunch of Free Web Design Resources
5. High-Speed computer
6. Software with a paid subscription.