Wow, tough call. My son did the two weeks @WWBA (16U team won it in 2008), and it did get him eventual exposure, offers and a chance to meet a D1 HA coach who would change my son's recruiting approach & perspective to a more academic focus. But that was 10 years ago when the recruiting rules were looser, different, and most of all there was no-Covid-19 limitations to see a recruit in person.
Given the information you shared, I'd probably save that money and put it toward a high academic showcase where the coaches are more likely looking for a combination academic & athletic talent like your son. You can always fish in the ocean where you never know if you'll catch anything, or fish in a lake where you know exactly what you're likely to catch.
JMO.