If City don't sign him, there are some top strikers like Haaland and Lewandowski also. I guess they will reach an agreement with one of these 3 players in this summer.
Tottenham's key player at the moment is Harry Kane. The team depends on him. If Harry Kane leaves Tottenham, Tottenham's performance will be worse. So Tottenham doesn't want Harry Kane to join any other team. But Harry Kane needs a good squad. Manchester City is the perfect and suitable place for Harry Kane. Both would benefit if Kane moved to Manchester City.
Every player has a key role to play,that doesn't means that if Harry kane moves the team won't perform good...it eill only take time once he's been replaced theyll be back at there best.
They should ket him move and use the cash to rebuild the team,i believe Nuno Santos will give he's best this season.