For the sake of comparison, look at Brad Newley: was dominating the NBL by age 22, with NBA size (6'7"), good athleticism and a capable finisher at the time. He was drafted VERY late in the second round at the 54th overall pick in the 2007 NBA draft, and hasn't realistically had a proper look at making an NBA roster despite performing well internationally.
Patty Mills isn't guaranteed a spot in the NBA any given year despite arguably being Australia's best player; Matty Dellavedova may not be drafted despite his very well-rounded game; Joe Ingles is only now garnering remotely serious consideration by NBA teams after tearing up the Olympics; Thomas Abercrombie hasn't had a real sniff at the NBA; world-class scorer Kirk Penney played very briefly in the NBA in his career.
At a similar age to many of the players listed above, Jason is largely unproven in the NBL. He will likely be a very capable starter, but I doubt would receive interest from the top leagues in Europe in Cadee's prime, let alone the NBA. PG is also a very contested position, with plenty of talent worldwide. That's why the NBL has the likes of Cedrick Jackson, Kevin Lische, Gary Ervin etc. Cadee has virtually ZERO chance of attracting serious NBA interest.