
The €100 budget might be broken but I’m running a Pironman5 with a Pi5 16gb and an SSD and it’s a solid server.
One thing to bear in mind is that SD cards are very bad at constant writes so I’d recommend any heavy write processes write to the SSD drive (databases, file storage etc). I use it for several things including as a build server - running Gitea as a Podman image.
You can probably save some money by using the smaller RAM Pi5s but I have no complaints about mine, and building the case was a fun exercise.
Independent retailer in the Netherlands here: https://www.kiwi-electronics.com/en/search?search=pironman+5
Best of luck with your project.
Time for a weekend away at Hilbert’s Grand Hotel, methinks.