As we talked before we will clone and transfer the Site as it is into wordpress,
I want to summarize the task once again as in the chat we talked about it i think some might be ignored!
You need to setup and configure all the necessary plugins for SEO optimization and optimize the site according the Seositecheup report using the content from the existing site ( keywords pages etc..)
Install and configure all in one SEO or yoast seo , translation plugin, find and configure a suitable plugin for the new function for user to register and submit their requests for quotations.
Set up social media sharing plugins on blog and pages etc..
The rest or what might come we can talk over the chat here