I think he’s way to far along to start over, Mike. Not many people can make that kind of call after putting in that amount of work.
But this can still be salvaged. Keep the sides panels, rethink the front.
Ditch the 50” screen, it’s waaaay too big for the distance you’ll be standing away from it. I know Texas is all about BIG, but seriously, that’s not going to be comfortable to play on.
The entire CP doesn’t need to be enclosed into the cab. You could have it overhang like all the older multiplayer cabinets from BITD. Konami, Midway, even Capcom titles had a overhanging CP on the sides.
With the overhang method, you can make the cab less wide, and get a smaller screen to accommodate.
(Ps, getting serious Monolith vibes from this one. That project crashed and burned too)