The tabletops also seems a bit too thin and wiggly for my taste, but, honestly, for LAN parties with chill people you personally know — it's ok
As for the actual host setup with a singular disk image — great job! LAN gaming centres do something similar with their setups, with some differences (a lot of centres either use Windows-based diskless solutions that mount vhdx files as drives remotely over iSCSI, or use ZFS-based snapshotting, which is my personal favourite)
But all in all, seems like my dream house :)
I own a chain of LAN gaming centres, so the feedback is definitely skewered into the business perspective quite a bit
For one, if you get a bunch of nerds together a sizable fraction are likely to have sensory issues- and won’t come again if you don’t make it welcoming for them
Some video games require some sound as it shares information, but can usually be configured to only have those sounds, or to turn on an accessible visual indicator
Each computer has a sound bar and everyone just uses that. Yeah, that means everyone's sound gets mixed up and you don't get positional audio, but in practice it's fine and we'd rather be able to yell at each other.