Solution simple: Case From Lake. Not only do they do custom builds, you can have them add custom features to their "standard" fare. Power supplies on those are always overspecced, they're super-solid, and you might even wind up working with them to come up with a fully portable solution...yes, even for THAT MANY modules! https://www.casefromlake.com/
Another source for gawdawfully-huge studio cabs is ADDAC...they've long offered cabs that offer 197 hp (ie: 1 meter) rows, plus they share CFL's philosophy about having enough current capacity...and then some. You can even get some 2U 19" rack toppers for those, and there's 2 x 168 of tile rows right there just by adding some tile frames and power connections.
Then for the ultimate in Eurorack case overkill, there's https://eurorackmodularcase.com/. Just click it...no explanation needed there!