Ten Hag want to change Manchester United become Ajax, it's why he mostly sign players from Ajax and Netherlands's players. This is why there are a lot conflicts between the old players and Ten Hag because they didn't want to gets replaced.
That 200 Million Euros is offered by the team that interested to sign him, not demanded by the team that own Yamal. So there's no point to discuss expensive or cheap because PSG has no worry to spend 200 Million Euros for him.
Since Ten Hag officially coached Manchester United he has continued to target Dutch players, especially Ajax who are claimed to have many talented players to make Manchester United better, but since the arrival of Martinez and Antony it has not had a very big influence on the Red Devils in competing in the league, not enough there even ten Hag re-brought Onana from Intermilan who previously played for Ajax in the Eredivise League, I think if Manchester United continue to defend Ten Hag with his philosophy then we might slowly see red devil team disintegrate as was the case with Barcelona where Ronald Koeman was dominant in favour of netherlands players even though the player was no better than other players.
Talking about the transfer of yamal at a price of 200 million euros in my opinion is just a ridiculous thing, indeed we do not doubt the wealth possessed by PSG but by buying a 17-year-old player for 200 million euros will not only damage the transfer market, indeed currently Yamal is a very promising player but what if he actually fails in the future like other players who have been claimed as the next Messi such as Bojan Krkic, Deulofeu and Ansu Fati ended tragically in my opinion.