There is always student loans, that can also cover living expenses as well. I'd be ok with paying the players, as long as they had to pay for all of their school cost. The problem is that some of the players have no skin in the game. They are only using college for a stepping stone to the Pro's, not a higher education as intended.
It's an incredibly small percentage of college athletes that turn pro.
Less than 2%.
I doubt volleyball players would make much on autographs.
http://www.ncaa.org/about/resources/research/probability-competing-beyond-high-school