I think that even if Txiki has a good relationship with Raiola, his strategy with advising his clients to not renew their contracts until they are about to expire to make sure his client (and himself) gets as much money as possible could be another issue that makes it more likely we will go for Kane. I dont see anything wrong with Raiola doing it, since he works for his clients, and not the clubs, best interest and no matter what we think of it there is a reason many top class talents like him as their agent. People need to understand that the commission agents gets in the end comes from the players pocket, since it would have been him that would have gotten that money otherwise. How the player and agent chooses to split their earnings is up to them. Dont believe shit stories like "player X and clubs Y and Z have all agreed terms but the agents fee is a stumbling block". If that was the case the player would just fire his agent and he would have a hard time attracting clients.
But as the situation with Pogba and now Donnarumma has shown, the financial benefits of signing a younger player that usually have a resale value, or would save some money on transfer fees in the future if the player renews his contract are pretty much gone for the club if Håland would choose to use the same strategy as mentioned players to maximize his earnings.
Of course there is a different scenario with City, considering most players want to win as much as possible and earn as much as possible while doing. We as a club can in most scenarios offer both which is a main reason most of our successful players stay here for a long time. The fact that at the moment there is no really step up from City like Real or Barca have been previously also makes it more likely any top player would like to stay here as long as possible. But I dont think it would be much cheaper to extend Hålands contract if he signed for us than it would be to sign a replacement if he would want to leave.
With that said, I would still prefer Håland over Kane, mostly because his connection to our club and I think he has the potential to be better than Kane over the time of a 5-year contract. If everything would work out he could be a club legend, and that is something Kane could never be. I would of course be more than happy with either of them, but it would not surprise me if we end up with someone like Andre Silva because his price tag of 35-40m seems more in line with how City usually do business. I think we would be willing to break our transfer record for the right player, but If Dortmund and/or Spurs demand 150m or more I think we will walk away.