I'm really interested to try staticman to run from a pi, but I found a bunch of different ways that I'll experiment with and have listed here.

That page is geared towards GitHub Pages\Jekyll, however a number of the solutions are SSG agnostic.

https://staticman.net/

https://github.com/aioobe/dead-simple-jekyll-comments

https://infominer.id/web-work/posts/github-pages-starter-pac...

Op here, I am using Disqus for comments. This is very easy to setup. My template even supports this out-of-the-box. Google Analytics is even easier - the only thing you have to do is set your analytics ID in your hugo site configuration.

Not OP, but you can embed Google Analytics (or Tag Manager) into your Hugo template, and it's fairly straightforward to do.

Comments I'm not entirely sure of, because I never wanted them on my site in the first place!

For comments, check out https://commento.io