yeah I was proposing multiple users in US. It's gonna be a pain to ship 30+ boxes in US for one person. The seller won't be shipping all - lets say 30 US boards - in one package anyway, right? my 2 cents.

btw yeah, CMPSU-550VXEU is enough. Depending on your situation you can consider powering multiple boards with one psu. I did power an 8-core motherboard and this 16-core with one 650W psu.