I think even if Manchester United want to copy Chelsea’s process of reviving their squad it will be really difficult because of United’s financial situation currently. For United to be able to make notable changes they will first need to overhaul their squad, giving way for incomings before they can make any significant changes and I think that is the stumbling block holding them from making signings currently.
That's the bad thing, and precisely what a team like MU needs most is money, as I said before , there are players who are very good who love MU, one of them is CR7, but after What they did to him , what desire would he have to help ? Or just go because he wants to see the Team at the highest level ? It's difficult , Some players or most have been sent out the back door, and that's something that is not forgotten.
United caused the problem themselves, because they so much believed in Ten Hag and gave him millions of dollars to sign average players. This was how they put themselves into this financial mess. They spent hugely and nothing to show for it. Rather, they're running at loss because no club will buy those players from United on the same price, but far lower because the players don't worth the high value.