Wiox

It is a giant MITM proxy, and whoever who has access to their logs have the potential to gain a lot of control

Afraid.org is great :) I do recommend

Since your name is Hemlig, I assume you are from the Nordics. Loopia has support for dynamic DNS.

All domains works with Dynamic IPs - it all depends on what DNS-provider you use :) Provider like Cloudflare ( I do not recommend Cloudflare) and afraid.org both offer dynamic DNS.

Intel NUC is probably the best choice - silent, possible to have two SSDs, pretty low powered.

Personally, I did settle with 13 Dell optiplexes 9020 SFF

I did try to automate abuse emails via fail2ban, but that ended up getting my entire domain removed because it generated so many emails

Oof, I recenty gave away a couple of servers,

I tested your helm chart and it just worked :)