There were rumours around a while ago that Dubai were looking to buy a top club, so you would imagine that if Manchester United is up for sale then they would likely be sniffing around. However, would they buy United considering Abu Dhabi own City? I know football will not be as tribal there as it is here, but it could risk putting a slight strain on their relationship if both are competing with each other. They would certainly have the money to buy the club, clear the debt, renovate the infrastructure, etc.
An American consortium, or several, will no doubt be eyeing us up too. It's almost inevitable there will be interest from the States. It depends on the model to be adopted, and how gung-ho the potential buyers would be. Could have anothert Glazer arrangement, or even a Todd Bohely style where they come in and take a more hands on role.
I'm not sure if Qatar or Saudi could buy us. Not from a financial point of view, but surely the same owners can't own multiple clubs in the same league or playing in Europe against each other. I'm fairly certain there are rules/laws against that, so it may rule them out.
Sir Jim is a bit of a dream. United fan, Manchester lad. I wonder whether he has the money that would be needed. I think he'd have to come with other parties involved for the finance needed.