In 2022, he makes roughly $60 million on field and $55 million off field, for a total compensation around $115 million per year. I doubt he'll take the Saudi offer as it's a garbage league and he doesn't need the money ($500 million net worth). He can probably get near the same again in Europe, although none of the big teams are willing to offer him a large contract at his advanced playing age and the disruptions it can cause their team (he can't even get into the Manchester United starting 11). Potential move to the US' MLS league, although there'd need to be a LARGE off-field package. Lionel Messi, the other world great, is also rumored to be heading to MLS to play for Inter Miami.
So, $350 million is 70% of his current net worth. That’s not nothing.