I am reasonably sure that the money he has lobbed at Chelsea has been converted to equity, or if not, appears on their balance sheet as an unsecured, interest free loan. Roughly, he has sent £1 Billion their way.
The market cap of Chelsea is said to be just north of £1 Billion, and finding a buyer would be relatively easy.
Whether its equity or club debt, either would be returned to him. Moshiri is doing essentially the same thing here.
Yup, at the end of the day, the money he put in (a liability to the club) is represented by assets of the club (theoretically, but very volatile ones!), so if he is the club's 'owner' (which infers it is equity he holds), then he's paid back on sale. If it's debt, I'd assume he has a watertight document to say he's repaid on change of 'ownership'. Very happy for Moshiri to follow that model!