Even if let's say he wasn't as crazily expensive as some ar projecting, it's still way out of our range for the time being. Between City being financially elite, having probably best manager around, and the possibility of winning ballon d'Or if City wins CL since De Bruyne's star is fading...
Everything makes sense for Haaland, from the financial package, to being managed by a legend, to having solid chances at individual accolades since City isn't really a very star-oriented team.
He'd be the face of their attack. And if they get CL it will be promoted as Haaland giving them the edge that they've been lacking for so many years under Guardiola. The story is a good sell for a Ballon d'Or.