Thanks, adbono, for your useful clarifications. I've watched various players move through college baseball, and I agree with all you say, and I'd add one thing about metrics. I entirely agree that metrics are not enough, that hitting 90 or running a 6.8 60 will not get you recruited by D1s by themselves (never mind lead to playing time or success). You have to have more than that. However, without those metrics, you're not likely to get D1 interest at all. Many people don't understand that part. Bob's story about fielding explains why. I had never understood that part until I read a similar story here. That's why this site is so useful for non-baseball people.
To the OP: Ivies and many D3s offer a lot of need-based financial aid, and some D3s also offer a lot of merit scholarships. You won't know what your family can afford until you go through the process. Most colleges have a financial aid calculator on their website, it will give you an idea.