You and your son caught a terrible break, as shoulder injuries/surgery are very difficult to overcome. I know neither of you want to hear this, but I would focus on academics and getting into the top schools of his choice. That, it itself, is very difficult.
You will get an idea of the financial aide package using the school’s calculator. As you complete them, if you say to yourself “no way” upon seeing the result, rest assured it will be “yes way”
My oldest, HA/no sport student, applied to 12 schools and got into about half. I think all non-athletes need to be prepared for that volume and results.
If his accepting schools end up with a baseball opportunity in year one, that’s great. If not, he can look after that year or realize, it’s not as important if he loves the school he’s at.
I wish my response was more positive, but I just think it will be difficult for your son to be offered a roster spot, coming off such an injury.
Best of luck Tequila, hope I’m wrong!