For a player of Nicolas Jackson's caliber, Chelsea's asking price is clearly very high, even though they have benefited from the Club World Cup. Manchester United has set a modest budget in the current transfer window, having spent heavily on players last season, but the results were disastrous. This is evident in Manchester United's current transfer process, which demonstrates their careful negotiation, as evidenced by the two players they secured.
Chelsea are just trying to see maybe they can tempt any of the clubs to pay close to this price, Jackson is not worth this price and moreover Manchester United wouldn’t even spent such amount on a striker now and not to talk of signing Jackson with that amount.
Don't be too confident buddy, the hierarchy of Manchester united are very unpredictable, they can do the unthinkable and shock the football world, Nicholas Jackson is not that bad as most football fans are making it looks like, just that his wastefulness in front of goal is just too much for any right thinking club not to pay close attention to before making any decisions wether to go for his signature or not.
At Chelsea presently he knows that his playing time will be limited because of the quality attackers that has been brought in, so if he want to be playing week in week out, he has to move to a different team.
So If he succeeded in going to Manchester united, I think that he is going to play ahead of Hojlund because he is a better attacker than the Manchester united center forward.