I understand what you mean, so then we're back to a matter of conscience.
Ultimately it's our conscience that lays bare before God, so if you feel that the money you would be sending would go straight to God's work, then you know what to do. If on the other hand you have doubts whether this will be used to support his somewhat lavish lifestyle, then you also know what to do. He may have the greatest intentions going, but the fruit and common sense (his), will still be the determining criteria here. It's really not about what he says he needs, but about how your own conscience is handling the situation. :-)