Ahhhh have you double checked to make sure your GPU will fit in your case? I see you went micro atx for case and mobo, but gpus nowadays be chonky. It should fit, but I’ve seen new builds where the gpu didn’t fit in a normal atx case due to layout and mobo positioning.
I’m not sure what all data they get if you self-host their controller. I’m pretty sure you don’t have to make a unifi cloud account at setup, you can make a local one. You can turn off the collection of diagnostic data at setup. Now that’s not to say they don’t send it anyway,