Yes, he is an expensive manager and everyone knows why (he is worth the money). Everyone talks about his failures, but the fact is that he won titles with literally every team except Tottenham, even with Roma.
By the way, if you look at how things are going with the pool of available coaches, I wouldn’t be at all surprised if he finds a job in a top league and a top club.
Calling a coach who has won many titles so far from many leagues, Portuguese, Premier League, Serie A, La Liga and Champions League, Europa League, Conference League as a failed coach, it's big joke.
He can not satisfy all bosses and fans, sometimes he did terrible things and his clubs got very poor results but generally, Mourinho is a successful coach.
I would definitely love for him to be coaching again in the Premier League and especially Newcastle is also of my liking.The reason is that Newcastle this past season did not perform that well in the Champions League and I think this was partially due to the coach of Newcastle not reacting like he should to situations when Newcastle was conceding the first goal.If Mourinho is to coach them now I think Newcastle with the players they have can achieve quite some good results in both Premier League and Champions League.
Mourinho sometimes said that he loves the air of Premier League and it's his most favorite league to do his coach management. I believe if he receives good offers from Premier League clubs and from competitive clubs, he will seriously consider about these offers and will not refuse any chance to return there.
He is a good coach for short term targets like winning titles within 2 or 3 seasons, not longer as his high ego usually triggers internal conflicts with many people in a club such as the owner, sports director and even star players.
In Premier League now, I see Newcastle United as a most possible destination for Mourinho because it's nearly impossible to see Mourinho returns to Manchester United after bad experience seasons ago. In Chelsea, Pochettino probably gained trust and support from the owner. Only Newcastle United is a club that has good finance and competitiveness as well as ambition to win titles. It will be good cooperation between Newcastle United and Mourinho.