I got my question answered at a pretty-nice-but-not-fast seller of Brontastor.
Their product is REALLY amazing but I think it's a little overpriced.
It's an 8 hot plug bay + 2 hotplug bay +2 internal ssd cache bay.
Basic barebone config: no cpu, no ram, no disks, no raid card, just chassis and motherboard provided from Intel is more than 1100£. (1400€) VAT and shipping not included. That's HUGE.
Even for the best chassis i've found lately, IMHO.
Search keep going.