I'm just researching all potential options, but he would certainly prefer finding a spot at a 4-year institution.
Juco is certainly not out of the picture. If he goes the JUCO route it would be about $15k/year and start the eligibility clock. This would mean eventually transferring into a 4-year school, which would also eliminate his eligibility for any freshman scholarship for academic merit. Freshman scholarships are typically more generous than those offered to transfers.
Part-time commuter student would cost about $8k/year and not-start the clock. But he could also work part-time, which would go towards reducing that $8k/year costs.
The fall team he played for and will play for again this coming fall primarily plays against JUCO and college programs, so he does have opportunities to demonstrate his hitting against college arms.