• give her an estimated view of performance impact (e.g. by creating these pages, we expect N results in incremental traffic and revenue)
• give her some examples of how these pages could look (by showing other sites that do a similar thing or by mocking up some examples yourself)
• give her some ideas about the angle / USP you'll target that will help you perform well with these pages
• give her an idea of what would be needed from her to create these pages, and what may be the budgetary impact she should expect
• show her how you will start connecting the dots between the pages
• create some level of expectation around these may not be what's fully needed to be successful at a large scale, and that this is the start of an experiment
also, for some of the copy side of things, you could look at building these out using more of a programmatic service like , etc. if needed (reduce investment, speed up implementation and hopefully realize results more quickly).