You don’t target every college program there is. You need to have an idea where he potentially fits in. Otherwise you will waste thousands of dollars on the wrong showcases. You don't just throw spaghetti off the wall to see what sticks.
He needs to sit down with a baseball knowledgeable person who knows his game. They need to determine what level of college ball he might be able to play. Then you pick conferences at that level. Then you determine which schools in the conferences would also fit academically, geographically, socially, culturally and affordability. Then you build a business plan.
What is his pop time? Sixty time? Throwing velocity? Bat speed? Exit velocity?