While certainly doable, this project has some complexity because of the modification of an existing codebase.
I took a quick look at the code: Apparently we would need to modify the Queue and Scraper objects, add a reference to the currently running scrapper, and add a new listener for a 'pause' and 'resume' event on '[login to view URL]', which will interact with the current scrapper.
Making all of these changes is possible, but we would be modifying key parts of the system (most importantly the Scraper object), which is non trivial, and will imply to be familiar with most of the code. This is why I'm estimating 5 days and full budget.