The problem for the moment is the transfer of Kane and Madrid is actually still only centered on rumors and there is still no further development on this matter.
Tottenham seems like they will continue to keep Kane's price high enough because for now they seem to be preparing to lose him and of course a big profit should be made from this transfer even though this is not a big problem for Madrid but it seems that there is still no further movement on this matter .
What further development do you need? I'm sure Real Madrid management is trying their best to negotiate with Tottenham now. They surely won't tell the progress because there are many other teams interested to sign Harry Kane, too. Real Madrid will announce the progress when they already get the agreement from both Tottenham management and Harry Kane.
Of course, Tottenham will try to sell Harry Kane with the highest price because they probably use the money to buy a new striker as the replacement. But I think Real Madrid won't have a serious problem as long as the price deserves for the striker.