There are plenty of cheap treasure generators, like Unexpected Windfall, Captain Lannery Storm, and Surly Badgersaur
Sedgemoor Witch is a constructed-focused card which means it may not see much play in Commander, but could be a good option for sacrifice strategies in constructed formats
Or a Silverback Elder into a Moonshaker Cavalry
Either you are not red or you are three colours plus making this a little trickier to run
But that's okay, the keys I wanted to use to unlock this deck are already common, like the Font cycle, or Spellbombs, Armillary Sphere, and Evolving Wilds
Since my personal feelings about flavor dont directly impact the health of the game (for now) Ill say fact, but this certainly isnt my area of expertise