I use NoxInfluencer (www.noxinfluencer.com).
If you use the Channel Tools > YouTuber Calculator, Her Est. YouTube Partner Earning[Monthly] is $ 4,568.
YouTube takes 45%, leaving her will 55%, thus: $2512.
Since when does YT take 45%? And does that include superchats? Memberships? I'm not buying that estimation, if only because she is not in a full on panic, which she would be.
Her fixed monthly expenses are somewhat easier to calculate: Rent $1,300, utilities $100, automobile expenses (insurance, fuel) $200, mobile/internet services $200, taxes $200, other miscellaneous expenses $200. This amounts to $2,200. Even if I am overestimating her expenses by a few hundred dollars, her fixed expenses are taking a large portion of her income. I did not include health insurance, but if she does, add another $2-300 a month. Her food bill alone for both of them is easily over $1,500 a month ($50 x 30 days). She easily spends $1,000 a month in mindless consumption.
If those numbers are correct, ($4,700), she would need to pull $8,500 monthly income before YT cut to break even. Both NoxInfluencer and SocialBlade do not get even close to this number.
This is why she is using her savings to compensate for her lack of income. This is why she can't pay for bariatric surgery besides the point that no one will operate on her. This will last only so long.
Or it's because she doesn't actually set aside anything for taxes/savings or because she blew through it paying for her "cancer" treatment. Thee are quite a number of assumptive variables in your reckonings here. But let's say that calculator thing and you are right: if she were actually spending a grand a month on crap (takeout, target, torrid) over and above fixed expenses, and let's assume she had 30K in cash ready to plunk down for WLS, she'd have already blown through that and would be living hand to mouth. She clearly isn't, based on her continued shopping and eating out, and even though she's stupid, even she would be tightening her belt, so to speak, if her situation were that dire.