I think the way this is worded is deliberately misleading. It's worded as if she needed to actually reduce the costs in eight days, but it can also be read as "

I think the way this is worded is deliberately misleading. It's worded as if she needed to actually reduce the costs in eight days, but it can also be read as "create a plan in just eight work days". And that should certainly be doable. In fact you could do a little bit of research and then write the vast majority of that plan doc with AI and it would likely be good enough.