He's going to sell Tesla shares to pay off his debts, he's knocked off $4 billion already, he'll be able to keep doing that, make offers to buyout stakes of Twitter from people that really don't want to be involved in this shit show. Twitter will operate at lower costs, and also not be profitable for him given current information. That's financially fine.
The banks probably took convertible debt at high interest rates, but who cares about high interest rates when it's only been one month. He probably has a clause for accelerated payments, because its debt, not shares yet.
(after a certain amount of time, or upon default, the debt would convert to shares. but it can be much more complicated, and onerous than that too. lending can be fun.)
