Of course, you could say that about any transfer really or rumour, none of us work for the club etc. even the figures you've quoted there are within a measure of whats been rumoured, first it was €130m, then £130m, then... xyz, so on and so forth. We don't know the wages that Lukaku would command either, being arguably the top striker in an under performing league for two years. We are UCL winners, we are not short of money, we are doing an awful job at offloading hangers on and we are losing some talent in the process.. Its shaping up to be a very disappointing summer on the back of a huge elation with us, yet again, not backing a winning manager. Also, I am so so so disappointed we haven't backed Tuchel so far, he is by far, personality wise and coaching wise, my favourite coach. I'd hope we learnt from our Conte debacle, yes difficult prickly manager, but he took us to a league title none of us thought we'd be in for that year.
Bottom line, nobody knows the figures, but what has been quoted so far, to me, a fan on a forum, believes that we could achieve with our financial muscle. Considering Haaland would give us years at the top level being so young, its a safer long term investment than say, as I said, Lukaku who has played since he was young, had fitness issues and arguably has 2-3 years left, with us losing Alonso potentially, in the process.