If I were you, depending on the distance, I would definitely wait for the guy to drop down. Put enough recruiting effort into your Plan B recruit to get him to consider you, but don't offer the scholly yet. That way, if the international drops down, you save a bunch of money, or if someone else (i.e. D1 school) jumps on him you have your back up plan ready to go.
But if you have enough money, then yes, a pulldown is possible