What is the difference between a web designer / web developer / web architect? And do i really need all these people on a job? Okay, granted it is quite a technical site i want done, but i'm told about ALL these experts, and i'm quoted R200,000 + to do this, and i'm thinking: ****!!! With that kind of money i can "employ" a bloody good developer and pay him R40,000 a month for 6 months, and have more control over the end product. Or is it stupid to have only 1 person developing a big website?
Excellent question.
I spent an inordinate amount of time researching this very question when I put my site up. I wanted to know where I fit in, and the answer is a fuzzy one.
As icyrus said, the lines are blurry. A Web Designer will do the front-end - what the visitor sees. This generally includes styling, graphics, and layout. A Web Developer will do the functional aspect/backend, including (in most cases) database, server-side code, front-end functionality (where needed, and it is usually the case), and other bits and pieces. The Web Developer also needs to make the code he/she has written fit in with what the Web Designer has created. A Web Architect is a glorified name for a person that ties the two together - almost the Project Manager, if you will, while also concentrating on the design as a whole.
You can get one person to do the job (I am one of them

), but let me say this: a developer's design hardly ever matches that of a designer's design. There are few and far between that can handle both sides of the coin perfectly, and if you take on one person you may well have to compromise one way or the other. With it being a technical web application, you would do well to hire a designer for the initial design, and then hand that to a developer and let rip. Just be sure to specify in detail what you expect from each, and yes - documentation is one of those, and from both sides. The designer needs to supply a layout document, detailing the design aspects (CSS styles, etc.), and the developer needs to document everything else.
Out of interest, can you share what you have in mind, and how you plan to go about it? I'd love to know what you were quoted R200k for.