That includes gold like Windreaver, hybrid like Judge's Familiar, split like Protect // Serve, or aftermath like Farm // Market
Getting Moana on a location with another character and a Vault Door in play can deliver a huge pay-off, but if you're letting the opponent run away with the game while you try to set up all of those pieces, it just isn't worth it
One commander deck of 100 cards would be in the $1 per card range, so a full deck would cost $100, or maybe a little more if you toss in some tokens
See rule 701.48, Learn. 701.48a: Learn means You may discard a card
More redundancy is always good, however, and Zell comes down early enough to make the extra ramp useful