Yes, I don’t know how I forgot to mention that Iceshrimp and Sharkey both have Mastodon compatible APIs - so all the same apps work (mostly).

Based on your requirements, I would suggest looking at one of the Firefish / CalcKey forks. They are ideal for single user or small instances and they support s3 compatible object storage out of the box.

I would recommend looking at Sharkey or Iceshrimp. Both are under very active development and have very responsive developers if you need support.

If you would like to check out an example, Ruud (of mastodon.world and lemmy.world) set up an instance of Sharkey at (you guessed it) sharkey.world.

As in, I have Nginx running on my server and use it as a reverse proxy to access a variety of apps and services. But can’t get it playing nicely with AIO Nextcloud.

Yes I’ve not managed to solve this yet. For me, it’s hosting AIO behind my existing Nginx.

Who are you with? I get 150 symmetrical for £25 with Swish.