Kind of makes sense - casting is usually a webstream without extra dev effort. I’m not sure if you still can, but I used to circumvent twitch ads by casting from my phone. Not to excuse their shitty behaviour; I gave up on them years ago and started hosting my own content.

I installed this same system a few months ago. It’s been fantastic - responsive and intuitive. The 5V pin in the CN105 connector means no external power or wiring is required. We haven’t touched the remote since it was installed.

Sounds like you’ve done a bunch of research! Since you’re using unRAID, setting up your services shouldn’t be too difficult.

For your torrents and VPN, there’s a few in the unRAID community store - I’d recommend qBittorrentVPN from Binhex - here’s the documentation for setting up their VPN-enabled containers.

For Headscale, I don’t have any direct experience but unRAID has a decent Wireguard plugin, and should get you up and running in a pinch.

And for your self-hosted services (especially Bitwarden) ensure you’re not exposing this on the net, by VPN is the only option I’d recommend. Even so, I prefer to use Bitwarden’s hosting with a family plan, for peace of mind and resiliency. It’s also much easier for my family.

UnRAID is a great place to start - it allows you to scale cheaply as you need and is easier to fix mistakes. Good luck, and happy homelabbing!