Thank you for all your help remotelove you are awesome!! Here's a better shot of the space I'm working with. (Please dont yell at me about the dust its why I was heasitant to show I know how it looks lol)

I don't think space/length of cardwill be an issue. While I still have your attention I wanted to ask. In as simple an explanation as you can muster, what do I need to connect multiple GPUs to one motherboard? I don't quite understand how pcie lanes and bridges and all that work but from what I read its possible and you can use different manufactuer GPUs together for the case I'm doing. But how?? Theres only one slot. I know some boards have 2 or even 4 but theres homlabs with like 10 p100s chained together

Im going to clean the case. A few fingerprint smudges and a "smokeydope wuz here" drawn in should be enough dust removed

In all seriousness yep I plan to give it a real cleaning.