Can i replicate wordpress website with minimal cost

Dear friends ,

I am a researcher in an SEO company and I have been given a task to replicate a competitor’s website with minimal cost.

As per my search, the website is made in WordPress and it uses the Kadence theme. It has many customized ReactJS and php plugins. It has also a separate mobile view which is only visible on mobile .

Can I replace this website with Ghost theme and platform easily?

I think WordPress would be the better option for a website like that, Ghost is purely for publishing. Charting, calculators, and converters will all have to be developed separately and embedded via iframes or javascript.