Hi,
basically it's designing a site from a scratch, right? Regarding the CMS, so, you need some admin panel in which you'll be able to add content to the site. That would be specific content for one page only (eg the page user first sees, homepage with news that you would publish), or we're talking about categorized content with some advanced logic to be implemented?
Also, are you looking for your site to be mobile responsive, meaning, it would fit screens of the users coming from mobile/tablet.
And please, provide the example of the pages from which you got your design inspiration for me to see what we're talking about.
Anyway, I can lower my price if you can come out with proper and clear requirements of what you need, but if you need some SEO optimization, simple CMS, responsive design, it's 20~ days of work for sure so the price is as it is I guess. I'm sure you'll find someone from India to do it for lower price if it's too expensive.
Kind regards,
Kresimir