

Tailscale is great. Don’t believe the bad press. You can always switch in the future if they change their trajectory.
I run all of that on a Dell Optiplex that I bought refurbished in your price range. I couldn’t figure out the self-signing certificates to run nextcloud without a domain, so I run OwnCloud, but hopefully you’ll have better luck.
If you meet a man who has been logged out of his toothbrush, do not mourn him. He has chosen thus. He is exactly where he has desired to be.