All the PC parts should be compatible on paper but if there is something standing out please let me know. Or if there is a better alternative that I am not aware of, I would love to hear your thoughts. Thanks!
PS. The 6750xt was $379 just yesterday :( Missed my window.
Depends on how much access or permission you have to the building.
I have pulled baseboards from the wall and run cables in the gaps down and around a hall and into bedrooms. There's often a little bit of space depending on construction that you can wedge an ethernet cable into.
I've also drilled holes in floors and drywall to drop a cable down a floor.
I've also straight up run a cable down a hall and around a stairwell with rugs and duct tape over it to reduce tripping hazards. Once had one of those fancy rubber strips for the doorway.
Or if you got cash on hand, definitely possible to hire someone who has tools and expertise. They would probably be able to come up with a more visually pleasing setup than my function over form preferences.