There probably won't be any problems with registration because loaning requires much less money than buying out a contract.
Destiny gives Rashford chances (the move to Barcelona, which is participating in the Champions League, from United, which is not participating anywhere, is a huge chance), I wonder if he will be able to take advantage of them? I remember that at United he seemed to become indifferent to football, will this change in Barcelona? A strange transfer, but it will be interesting to see where it leads.