If in the future he is an international businessman, as he hopes. He must return to the u.s. again to repay you.And actually, I want to be responsible for the expenses that he must stay with you.
If, in the future, he was a businessman. International as he had hoped. He must return to America once more to reward you and I really want to pay for him to stay with you.
In future, if he is a businessman. International as he wished. He would have to go back to America once more in order to repay you and what I really want to get a charge that he must stay with you.