The very case when the dream turned out to be more expensive than money, because in the long run it will be easier to become a sought-after player at Real Madrid, they have everything they need for that. It will be interesting to see Real Madrid's transfer market in general this season, they have few weaknesses in the squad, but the new coach is unlikely to think so and will bring in the players he wants.
Dean Huijsen did not waste the opportunity to join Real Madrid, even though he almost joined Chelsea, Liverpool and PSG were also interested in signing him, but once Real Madrid came calling, he closed the door on the club even though he was offered a higher salary than he received at Real Madrid.
His contract with Madrid will start on June 1, 2025 and will officially play in the Club World Cup, this deal also makes Huijsen the most expensive defender in Real Madrid history.

Source: [Transfermarkt]
Hopefully he'll do better than the majority of the names reported in that list because besides Ramos and Pepe all the others have been hugely overpaid and never played up to their level in Real Madrid. Even a world class defender like Walter Samuel didn't do great things in Spain, then he went back to Italy, with Inter, and he won everything. Militao is good but not great.