Thanks to @dev and the new support for #yunhohost I installed @yunohost on a #rockpro64 by @PINE64 to try the combination.

Worked just fine.

Decided to put a system around it: NAS-case, sata-controller, an old SSD now accompanied by a new SSD as a mirror, eMMC to boot.

There's still space to extend storage by two 3.5" HDD or anything smaller.

Next: need to put the thing on the internet missing a switch to do so. Already configured a bridge to put it inbetween my router and firewall.