According to reporter Dharmesh Sheth, Hoylen's loan fee for joining Naples on loan is about 5.2 million pounds.
Manchester United has reached an agreement with Naples on Hoylen's transfer, in the form of a paid loan + £38 million for a conditional forced buyout. If Naples advances to the Champions League, the buyout clause will be triggered. Now it only depends on whether the player agrees.
The rental fee for this transaction is about £5.2 million.