First, Xavi will try his best to get Lewandowski on the team. Although it is now very difficult for Barcelona to raise that much money, it is not impossible. Barcelona may decide to sell Dembele and De Jong. Manchester United, on the other hand, has strikers like Cavani, Ronaldo and Rashford. They now need experienced defenders and midfielders. Taking Lewandowski to the team now foolish decision for Manchester United.
How is it not impossible though? Plus, Lewandowski is a great player, but if we are talking about "can barely raise that much money", do you really think that he should be the first player to get? Or even striker should be the first position to get? Someone at that age, providing no future profit possibility, just because he is a superstar?
I honestly believe that it would be another bad transfer made by Barcelona. They are famous for making terrible transfer decisions, and this would be another one of them. I liked Xavi's decisions, torres, traore, aubameyang, these are all players that would shine in a Barcelona system, Lewa doesn't sound like it would be a good idea.