I think his preference for Madrid has been exaggerated; in any case it seems that the presence of Zidane, Cristiano + his previous experience training in Madrid when he was 14 can give us some extra points if we have to bid with other teams.
Sincerely, I would prefer if he stays one more year in Monaco, however his moment is now, so it seems inevitable that he will leave this summer.
His numbers are fantastic. I don´t think many elite strikers have managed to do that in their first season, not only in the league but in the Champions League.
If Higuaín cost 90 million € with his age, then it is reasonable that Mbappe is above 100. It is a risk, but if we do not take it some other team will.
One of the reasons given by Marca´s article to put aside Hazard or Dybala is the risk of slowing the progression of Asensio, which seems very reasonable.
Madrid have to be careful with the money but I think they can afford to pay 100/125 million, even without selling James or Morata.