I second this proposition of DIY build. My current build is an older version of this using an ASRock motherboard with integrated Intel j5040. It’s already very capable! I run Jellyfin with HW transcoding and a dozen other containers and there is still plenty of headroom.

The Jonsbo N2 case is pricey but good quality, nice looking and nice to build with ! Cheaper options are there but not as nice in terms of looks and usability.