Actually in canon (or at least word of Rowling) there were two human Horcruxes: HP and Quirrell. That Quirrell was a Horcrux isn't explicit, and isn't relevant by the time Harry learns about Horcruxes, but Rowling has confirmed that he was.

A trifling amount of money by muggle standards, even if he didn't have the arbitrage trick, or the ability to make arbitrarily large amounts of money using the time-turner on FX markets.

That she is Bellatrix Black? That... doesn't quite make sense...

How does that tie into the numerology? It's stated that Voldemort wanted to have seven total shards of his soul - Riddle himself, diary, cup, diadem, snake, ring, and locket. Seems like she's contradicting herself.

There's a long history of witch hunts inquisitions etc. a taboo on wizard muggle interactions makes sense and is consistent with history. It's also has the merit of requiring fewer other pieces to be set up for it to work as an explanation.

The Magical economy generally doesn't seem to make a lot of sense. In canon it seems like every witch/wizard works for the Ministry, Hogwarts, or for a small restaurant or shop. I think wizards can pretty much conjure every basic material into existence except food and gold. That does leave an interesting question of where magical Britain is getting its food and gold from. There might be some witch/wizard farmers out there that we never hear about, or they could be just stealing food from muggles. Maybe the ministry sanctions some small scale trade between the magic/muggle world?

... where exactly does one stand when carrying out this plan?

Did I miss something, or do we still have very little idea about what the word substitution in Snape's remembrance of the prophecy means?

And Severus Snape drew a breath, and intoned, "FOR THOSE TWO DIFFERENT SPELLETS CANNOT EXIST IN THE SAME VULD."

versus

She couldn't imitate the deep, chilling tone of the original prophecy; and yet somehow that tone seemed to carry all the meaning. "The one with the power to vanquish the Dark Lord approaches... born to those who have thrice defied him, born as the seventh month dies..."

"And the Dark Lord shall mark him as his equal," came Severus's voice, making her jump within her chair. The Potions Master loomed tall by the fireplace. "But he shall have power the Dark Lord knows not... and either must destroy all but a remnant of the other, for those two different spirits cannot exist in the same world."

That last line Severus spoke with so much foreboding that it chilled her bones; it was almost like listening to Sybill Trelawney.

Meh, the original is badly worded.

No it isn't. Your 'Take 2' is an entirely different question. One that seems to miss the point. The question "Can Omega exploit a vulnerability of human psychology?" isn't a particularly interesting one and becomes even less so when by the definition of Omega and the problem specification the answer is either "Yes" or "I deny the counterfactual" regardless of anything to do with vulnerabilities in human intellectual capabilities.

There is no alternative self. None at all. The alternative may be impossible according to the laws of physics. It is only present in your imperfect model of the world. You can't trade with a fiction, and you shouldn't emphasize with a fiction. What you decide, you decide in this our real world. You decide that it is right to make a sacrifice, according to your preferences that only live in your model of the world, but speak about the reality.