Ronaldo is not the type to be ambitious when it comes to money, but an offer from Saudi Arabia could be an alternative simply because he can't decide the end of the season. But as we all know, Ronaldo's real target is to appear in the Champions League once again. If he's going to agree with Saudi Arabia, then I think his career is getting less and less heard on the European scene.
I definitely agree with you, Ronaldo major problem is to play in the Champion league next season, if at all it was money issues I don't think he would make decision about living Man United, anyways that assumption. However if playing in the Champions league isn't the major concern, then that is a good offer standing before him let him decide as his service is needed.
There is no doubt this is one of the biggest offer for any player even he is not interested in this but having 300 Million USD is not easy but as we all know he loves to play Champions League, so he will definitely reject this and will stay here in Europe because in any case if he is going to Saudi Arab then he is going to lose his career and this could be last from this legendary player most these type offers create some serious feud about player, and they end their career with them.
Saudi Arab soccer is also having no good quality which can fulfill desire of player like Ronaldo which is surely love soccer and have challenges is also good for him right now his next destination is not clear with few feuds are working around and these are mostly sure he is staying here in Europe.