One colossal labyrinth where the whole game happens, with a chaotic friends-suffering-together vibe, is a fun hook for a 3D artist to build around. I founded ComposerScout, a free spot where game devs find 3D artists and other game people. Post the 3D artist role there with the pay you have in mind (there's a Not sure yet option too), and artists who fit get it in their inbox. Takes about a minute. It's free to be on, and I don't take a cut of anything you pay people. We'd love to feature your dungeon crawler there: https://composerscout.com/#post