Xabi's football career was magnificent and he won the championship with Leverkusen in his first experience as a coach. They are in second place this year. I have no doubt that he will manage Real Madrid very well. We can expect extraordinary success in Real Madrid next year because I am sure they will make transfers. After the steps that will complete the missing areas, Real will again establish its legendary team.
Being a Real Madrid coach comes with a huge responsive and doesn't require a big portfolio before you become one but you must have a potential to conduct good games and I have seen Xabi conduct good matches but it should also be noted that what contributed to the success of the team isn't just the coach, the players involves plays a very huge magnificent role on the success of the team and Real Madrid are very coordinated when it comes to player selection.
If Anceloti can comes with his own portfolio like that to Real Madrid, so is Xabi. He got some trophy and he's got some experience to lead the team. There are speculations on new players coming to the club, who know if he is going to be the best team because I can tell, Anceloti never had to use full potential of his current team, Mbape hasn't done his best yet and there are more new players coming by the end of this season.