If they just wanted a site from copying your source they could just find a free layout on the internets somewhere. lots of places offer free CSS templates. So if they knew their way around enough and could get something simple for free and it was good enough for them, you wouldn't get them as a customer anyway.
You should sketch out some potential layouts before you start coding/making graphics. That way you'll have an easier time changing your mind on it, you wont be attached from all the work.
You should sketch out some potential layouts before you start coding/making graphics. That way you'll have an easier time changing your mind on it, you wont be attached from all the work.