The difference with Chelsea as i understand it is Abramovich has used his own money and it's his club so if he walks away Chelsea aren't left owing anything, all they'll have is a large wage bill. In Man Utd and Liverpools case the owners have mortgaged the club, therefore until that's paid it's owned by the mortgage company. This means that Man Utd and Liverpool are yhe ones in financial jeopardy not Chelsea