In one of these links, I am quite certain I saw words to the effect of "if you maintain a balance in the business, then the following tax year, it will count as a negative deduction for the shareholders (i.e. you), because the business type is a pass-through entity, and pass-through entities are expected to pass all of their income through to the shareholders."
The fact is, I don't know whether it was an LLC or a sole proprietorship, and I'm now second guessing what I thought I knew. Because yes, it does sound pretty ridiculous that an LLC needs to maintain a $0 balance or else it will penalize the owners of said LLC. That doesn't sound right.
And yet, words to that effect were located in one of these links. (Hunting for it now.)
EDIT: Welp. Can't find it anywhere. At least I admitted from the outset that "ask your accountant, do not trust me" is reasonable advice for anyone thinking of taking business advice from random HN comments.
I'll downshift to "I don't know whether it's a bad thing to maintain a long term balance in an LLC, but I'll be finding out the answer before the end of this tax year."
If there's no disadvantage to keeping a balance in an LLC, then I revert to "Just form an LLC for yourself; it costs $50 to do so. And you can keep as much money in it as you want, as long as you don't mind paying income tax simply for transferring money into your LLC."
It's possible I was thinking of a negative tax basis for an S corporation, if the S corporation has a long term account balance. But a tax basis is certainly not the same thing as a tax deduction, so I throw my hands up in the air and say "I'll be using a portion of my consulting income to clarify these questions with both an accountant and a lawyer; all advice should be considered suspect."