Since catching The Big Bang Theory a few times at my parents as they've adopted it into their rerun viewing habits, I'd like to posit the likelihood that this elevator factoid is simply a falsehood ripped from normie/nerd TV. Just as Chelsea changed her name to honor Harley Quinn & Cpt. Kirk from her diet of television, so too I suspect she absorbed the running gag/story element in TBBT of the apartment elevator breaking down and the cast being trapped in it a few times/attempting repair/using 3 flights of stairs because it's perpetually broken.
Also a possible cross-over to Aerosmith's "Love in an Elevator." Between the two pop-culture references, and her history of affluence and absorbent personality, it's clearly a lie wrapped in references. We know she had expensive lawyers. We know she took an extended trip to Europe. We know Alex is the trust fund kid of a billionaire arms dealer(with two prior residences in Beverly Hills rent-free under his parents' names & a $4,000/month allowance).
Likely what happened is they didn't live in an elevator, they just fucked in a rarely used/out-of-the-way one for the exhibitionist thrills and hid the truth in a "poor us" lie. Tell it long enough, it fades off in the distance far enough, and you start to believe it.
You only get to do that once, any more and it has to be the same guy. Otherwise everyone sees the difference between your past and current work. Looking at Depression Quest, all her shitty one-day projects, then looking at a finished FMV game, even her most loyal sycophants would be able to tell if someone good did the work for her & break the illusion.
Plus, she's clearly bad with money, spending it on absolute nonsense. This sort of person almost never uses their windfall, no matter how large, to ever solve long-term problems sensibly. The thought you posted would never form in her head, and it would slide right out even if you tried to force it in there.