In Vance's book Hillbilly Eligy he wrote about receiving a considerable financial aid package from Yale. It's been a few years since I read his book so can't quote directly.
Here is an excerpt I found online. Yeah, it's huffpost but it is an excerpt from the book:
"I was sufficiently committed to going to Yale Law that I was willing to accept the two hundred thousand dollars or so in debt that I knew I’d accrue. Yet the financial aid package Yale offered exceeded my wildest dreams. In my first year, it was nearly a full ride. That wasn’t because of anything I’d done or earned—it was because I was one of the poorest kids in school. Yale offered tens of thousands in need-based aid. It was the first time being so broke paid so well. Yale wasn’t just my dream school, it was also the cheapest option on the table."
https://www.huffpost.com/entry/yale-law-school-inequality_b_5772a27ee4b0dbb1bbbc11b9
How Peter Thiel and Silicon Valley funded the sudden rise of JD Vance
Donald Trump’s VP pick was a venture capitalist who has been bankrolled in business and politics by billionaire investor
https://www.ft.com/content/408fb864-5831-4b1d-beef-fd1966b3beed
The name of JD Vance’s venture capital firm is a homage to fantasy author JRR Tolkien — and billionaire tech investor Peter Thiel.
The PayPal co-founder’s influence has marked Vance’s career, seeding him millions of dollars to launch Narya, before funding a successful campaign to win a US Senate seat in 2022.