Thank you for your extensive answers, now i have more questions than before :-D Due to time and energy i tend to an out of the box, non OSS solution. I’ll keep you updated on my decision and how it went

This is a great community.

This is definitively a solid and straight forward plan, i like.

Good Point, right now i prefer a plastik box for convenience. Unify and Fritzbox are already my shortlist.

Thank you

I’m happy with my super small wallet for 5+ years: https://www.i-clip.com/96/i-clip-original-soft-touch?number=IC_111_R11_C121400