Thank you very much for the placement guide. Very interesting to read. OSMC has worked before, and every other device works now, so I assume this is not the problem.
I understand that Wifi “needs to be a separate issue from everything else”. There is exactly one device with network problems, and this is the Vero. So I assume the problem can be concentrated there.
I have been using NFS (v3) over wifi for the last 4 to 5 years. My central file server provides NFS (cabled, however), and I access it from a variety of wifi devices to read and write data from/to it. Everything is backed up. And, OSMC/Vero is meant to read the video files from there.