I've only set up a community page, on FB, before, but there was no need for advertising. On a personal, level, very rarely, do I click on the ads.

Do you also, use a website, ontop of Fb? Have you set up your SEO settings? There is something out there called Gorilla marketing, and for the community website that I manage, I don't find the cost to be worth what my community needs the website for. I can manually set my meta codes, without paying an arm and a leg.

It's not for profit, as it is.

Hope you find some others, here, who may have more experience with advertising.