@Prestwich_Blue and others will know better than me but I think the Glazers already use United as equity on loans in other parts of their crumbling empire.
From a banking perspective United are already highly leveraged, its difficult to get a full financial picture - with the mystery of the Cayman Islands etc and whilst they have huge income - there is a view that their income it maxed out - certainly while the team is so shite that’s for sure. Despite their huge income their cost base looks a bit out of control - highest wage bill in the league for a team struggling to overtake Sheffield United - with so many big transfers being paid over the course of the contract and sky high wages they need to keep growing their income as a prerequisite of their business model but their income is going to fall sharply in the short term.