I don’t know Void-musl.

I don’t know if you can install libnss-mdns. If /etc/nsswitch.conf is not standard you also need to configure it.

Are you able to setup VM with Debian, so you can test with a standard environment?

My understanding is that dig does not support mDNS.

The most common way to use it via avahi-browse and avahi-daemon (mDNS service).

https://askubuntu.com/a/1526875

The following failes for me:

dig "pihole-s5.local" @224.0.0.251 -p 5353

The following works for me:

$getent hosts pihole-s5.local
192.168.2.10    pihole-s5.local

Zfs loves memory, vm loves memory.

If you have the funds for it I would get a minimum of 32 GB.

What about https://github.com/automatic-ripping-machine/automatic-ripping-machine

https://youtu.be/wPWx6GISIhY

You write that you need help. From the questions it sound like you need experience. You may not like my answer.

BTRFS and ZFS are very similar, try them out figuring out.

Try LXC if it doesn’t work for you, use standard VM.

There is nothing wrong with have all in one machine, one VM per service or a hybrid.

There is nothing wrong with using a WLAN as long as you accept the consequences of that.

I think you should try it out and get some experience, what is the worse that can happen? You learn something and try something different.

It reminded me of Pacific Drive

Then a tool like netdata may be the thing.

A tool like Librenms will give you this.

Do you want to use desktop app or systemd timer?

How can I be sure that my traffic is routing to the Wireguard VPN?

Use ‘tracepath’.