The Ronaldo family thinks Saudi Arabia as a business field only and not a place where they could settle down for good, after all, they are more accustomed to their own tradition in Portugal and so that's where the whole family will live after all of these businesses are finished. 2030 bidding might be Cristiano's limit that is why they are granting him additional payments because they need his influence to help the whole league win the bid and after that, Cristiano can retire for good from the football field.
I am not sure what he is thinking. And I am also not sure whether he is required to stay until 2030. His role is essential for the bid for 2030 FIFA World Cup. But the bidding process is going to take place much earlier than 2030. Probably by 2025 it is going to start. In case Saudi Arabia fails to win the hosting rights, then Ronaldo may be released and he will go back to Portugal. This time there is fierce competition for hosting, especially from the joint-CONMEBOL bid (Uruguay–Argentina–Chile–Paraguay), as well as from Spain–Portugal–Ukraine–Morocco.
I hope, at least just by Ronaldo playing in the Saudi Pro League, then it is enough for FIFA to appoint Saudi worthy of hosting. Because after all, it is not only Ronaldo who plays here, because there are other great players too like Benzema, Neymar, Mane and many more. So with that, it is clear that the Saudi have a good ability to be able to host because they also have money. Of course, there is nothing to doubt if they hold the world cup in Saudi, because of course it has proven to be safe and comfortable as the star players who play in the Saudi Pro League have also felt.