Just to do the follow up…
Bought everything on the list except the 2x 8 tb hdd, as I already had 2x4 tb, I bought another 2x4 tb, because if I bought 2x8 tb I would only get 4 tb more space and I would have to pay double the price…
Also bought the UPS…
Everything works fine and I am very happy with it…
I agree with node 804 being better option for expandability but I wanted small footprint for the case…
Also, followed tutorial mentioned above "iGPU is sufficient” and very happy with it, so I don’t think for my use case that I need dedicated GPU and reading about transcoding with 13th gen Intel being even more powerful if I need more power I can upgrade along the way…
Thank for all advice