One for each RGB hub, 1 for the Lighting Node Pro, surely 1 for the Aorus fan controller, 1 for the H150i, plus all the normal stuff like SSD/HDDs. You will need a lot of SATA PSU connectors. Although, that may be one thing to plan for. 6 x LL (0.30A) will be 1.80A on fan controller, but surely the Aorus model is SATA powered and that should handle it with room to spare. The only thing to watch out for is total current on the Aorus. All it needs to be able to do is handle a PWM fan, so there should not be an issue. Those you will be able to cover that with the Aorus controller, although I am not familiar with it so I can't give any more feedback to its use. corsair is crazy expensive and their fans are boring (other than ql). now i have no choice but to buy corsair fans. The thing that shipped with aorus boards RGB fusion its a buggy mess, i tried openrgb and it causing me stuttering issues. The H150i has it's own fan controller (that you should use) so that reduces the number of case fans in need of control to 6. I want to know how you guys control your rgb fans and peripherals.

The 6 + 3 on two RGB Lighting Hubs is fine (you will have one left over as a spare).

2 wires on each fan, one for lighting and one for fan motor power/speed control. It seems to me I will still have one fan without Control. My plan was to link 6 fans using one channel of the lighting node pro, then the three fans for my H150i using the other channel, and plugging the 8 fan cables into the Aorus RGB Fan Controller, to give me fan control.

Aorus rgb fan commander