Design a Website Mockup

I am in the process of launching a travel related website which will help people create a customised itinerary. There will be 8-10 pages on the website and I have a functional flow available with me which shows how the user flow will be. I also have a developer who will code the backend engine. However, I need some professional help in getting the web site design (or UI design if that is the right term) In simple terms, if i give you a pencil drawn picture of how the pages should look like , will you be able to provide me with a working flow of how the pages should look like? You will have to take care of all the usability aspects and how many controls and what kind of controls. Is this something that you can do for me? If so, can you please let me know what are the details that you would need from me to take this project onboard? Also, do you have a rough idea on what sort of cost I am looking at for the web design part? This website will be data intensive (texts and pictures) and I will provide all the data that needs to be stored. So, a CMS will be required (I think)