IMO, you are very unlikely to monetize using anything other than advertisements. Just use google Adsense and focus on driving traffic to your site. A few things you can do:
* Expand the focus of the site to near-retiree/ retiree/ Fire and their need for regular monthly cash flow.
* Focus on portfolio construction using monthly income securities for different scenarios, economic cycles, etc. use criteria like low monthly cash flow variance, price stability, capital preservation etc.
* Add a blog/article section where you can post articles addressing your target audience.
* get inspiration from a few subreddit focusing on similar topics, for example /r/dividends, /r/qyldgang, /r/jepq, etc. Try to answer questions typically raised in such subreddits and provide tools on your site related to frequent queries made on such forums.