Osimhen should be able to choose between career and money, if he chooses money then he can go to a team that is ready to pay him and only teams from the Saudi Pro League are willing, but if he chooses a career then he must be able to put aside the money he will get, because I am sure there will be many teams who want if he accepts a smaller offer.
Now everything is gray, he wants a big salary but when there is a team that is ready he doesn't want it. At the same time there are no other teams that want to spend a lot of money to get his signature. If it is like this then I am worried that he will not be able to get a good team, right now he is lucky because there is a team that wants to borrow him even from the news I read Galatasaray is ready to pay his full salary.
To be honest making 30 million or so shouldn't be really that wild for Osimhen, he should be able to ask for that type of money. Kane is making 25+ million at Bayern right now, and not like Osimhen is any worse, and he is younger too so you could still get him, play him for a few years, and sell him for at least as much as you paid for him.
Imagine United gets Osimhen this summer, they could get him for 75 million which is the new release clause, and then they could just play him for two seasons, if he scores 25+ goals in both seasons, could sell him for 100+ easily, so Osimhen asking for 25-30 million at least is normal. If I was that good, I would ask that type of money as well, would totally make sense because players that good usually gets paid that much.