This, one hundred times over. Musk has been openly talking about bankruptcy. I'm shocked if only one commercial realtor has sued twitter over deliquency. Sue early, sue often, because Musk's wealth is locked behind a corporate veil and twitter just doesn't have that much in saleable assets.
Musk personally may not have a lot of wealth given that his lifestyle has been funded with loans secured against his Tesla stock, now almost worthless. There's also a lawsuit against his stock based compensation set to begin on 17th Jan, so that will be fun too.
Most likely, he's just (barely?) smart enough to recognize that it's a really bad look for the CEO of an electric car company to be using a private jet all the time.
I honestly doubt that has anything to do with his reaction. He's gotten very paranoid over the last year or two I think he's mostly just scared of people stalking him.