Sid Meier's Civilization VI

Sid Meier's Civilization VI

Yet (not) Another Maps Pack
How big can we actually go?
I'm looking into upgrading my rig for streaming and was wondering how big a map the game can actually handle. I've read a lot about Firaxis putting in roadblocks to nerf mods like this...is this true?
What's the biggest map you've been able to run successfully, Enormous, Ludicrous, Giant or Oversize? (Van/RF/GS/FP)
How much RAM & VRAM is sufficient for what IS possible?
I don't want to limit myself by under-upgrading, but neither do I want to break my bank.
TIA!