I think we should look at some of the "big 6" youth/under23 players and see if there are any good bargains there.
Reiss Nelson, Emile Smith Rowe (don't think he's realistic thou after getting all this game time), Harwood-Bellis (who's on loan from City at Blackburn), Tomori (think he's going to Italy permanently though), Guéhi (who's been at Swansea), and Gallagher all come to mind.