Just got a system up and running. Silverstone cs382 chassis with 6 12tb drives. 4 are in a striped mirror set and the other two are mirrored. I wanted protection and speed. The os and docker apps each have their own 1tb SSD. Rest of the hardware is old from eBay.
I'm coming from open media vault so although I'm not running anything but rsync now, I will be setting up a wordle clone, an intranet, and backup for family photos. I run some of the same stuff as you but I'll have to look up what the rest are. Tailscale is something I've wanted to do but haven't dug into it yet.
I may set up a task list for the kids chores as well.
Plex and all the associated things.
Not sure what else yet as I'm still setting up replication and stuff to protect what I have first.