New drives are more like 20€ per TB. Factor in redundancy with something like raid 5 and boom, off-site storage costs you a government toppling 20 000€ in hard drives.

It is doable, but it is a pain if the docker requires any special config like permanent storage. Getting nginx up and running for mTLS was especially annoying

Truenas Scale works well as long as you don’t want any dockers on it. Once you want to run docker images it is easier to install a VM on Truenas and run the docker from there than it is to try to set up custom “Apps”