This is an old thread, but this is the way to do it with United in the first transfer window:
Buy: Luke Shaw, Timo Werner, Eder Alvarez Balanta, Lucas Romero, Aleksandar Mitrovic, Will Hughes, and Juan Fernando Quintero.
Sell: Cleverley, RVP, Valencia, Javier Hernandez, Smalling, Büttner, and Young
Yes, this is possible. Barely.
Overall, this leaves you with a world-class team to begin with, but also already gives you a team that will be world class in a decade. The following will be a world class starting XI in the 2024-2025 season (and I've already got all these players after the first transfer window):
GK: David De Gea
LB: Luke Shaw
CB: Eder Alvarez Balanta
CB: Phil Jones
RB: Rafael
CM: Lucas Romero
CM: Will Hughes
AML: Timo Werner
AMC: Juan Fernando Quintero
AMR: Adnan Januzaj
CF: Aleksandar Mitrovic
Meanwhile, you're still a really good and deep team in the present anyways. Here's the depth chart after that transfer window:
GK: De Gea/Lindegaard
LB: Evra/Shaw
CB: Jones/Balanta
CB: Vidic/Evans
RB: Rafael/Jones
CM: Fellaini/Romero
CM: Carrick/Hughes
AML: Kagawa/Werner
AMC: Mata/Quintero
AMR: Januzaj/Nani
CF: Rooney/Mitrovic
And then you've got the following in case of lots of injuries:
Defense: Ferdinand
Midfield: Giggs (and Fletcher when he's back from injury)
Forward: Welbeck
So you're pretty set in the present, while being absolutely built to dominate for a decade or so to come.
View attachment 235249