Designers who don't know how to manage hosting etc? Ok... i know some designers only do the graphics and the css etc and don't have a clue about writing their own cms with php or something, but even the most simplistic designers know how to take third party (usually free) cms software and bang it on their own hosting for a fraction of what you're offering.
If they don't even know that then I'm surprised that they even label themselves as designers.
My brother in law, he's a graphic designer by trade, but has done the odd small website from home for a friends business etc and done a pretty god job considering he doesn't label himself as a WEB designer and he knows no where near as much as professional web designers.
Sorry if I'm coming across a bit arrogant but I have an image in my head of some 'designer' coming to use this system, and his/her client being totally overcharged for something that a more knowledgeable designer could have done cheaper and probably better, i.e. a more unique system, own design etc.