They’re caught between a rock and a hard place
If the talk of knocking down old toilet and rebuilding a new stadium is to be believed, you’re looking at having to play at a smaller stadium somewhere, which obviously leads to a revenue decrease.
Build a new stadium, cost somewhere between 1-1.5 billion, so do they take the Arsenal/Spurs route of stadium expenditure over players?
If, and it’s a big if, Pogba walks, Cavani, Matic,Mata, Ronaldo, Rashford wants out, Martial out, that’s 7, sure they’ll save a huge wedge on wages, but they still have to replace, not being in champions league will effect the calibre of player willing to ply their trade there, or they will throw ridiculous money to attract players.