The costs look horrific , it is going to take any club a huge investment with fee, contract and extras to obtain Haaaland.
Such a high costs, he would have to be a guaranteed huge success to justify it.
I think the issue isn't the cost alone, it's what the knock effect is in your own squad in terms of salaries. Even if Haaland is wanting 350k a week (I suspect they want more) that makes him our top earner outside KDB. We won't do that IMO.