Before you spend $2500 to take your 2021 to a Showcase I would highly recommend finding out his measureables first. If he isn't running at least a 7.5 sixty with an 85+ Exit Velo and throwing at least 80+ across the diamond or from the Outfield, there really is no point in Showcasing yet... And some would say he should have at least one of the following:
a sixty time below 7.1
an Exit Velo above 90
a throwing velocity above 85