Vaughn had a guardian that had a criminal record that landed a job in Vegas. His guardian or handler or whatever you want to call the guy is the reason he ended up at UNLV. It was a dirty deal.
I believe he got a job at Findlay Prep in Vegas. The same school Vaughn attended for his last year of high school. Findlay is founded by a huge UNLV booster. They could pay this guy whatever they wanted to for his services. Salary doesn't have to be disclosed because it is a private institution.
Since Vaughn had a prior relationship with him before he was a recruited athlete, he was able to provide Vaughn with whatever he wanted to, similar to a parent or relative. Findlay could pay the handler 300K to wash towels, of which he was free to give Rashad 250k free and clear of NCAA rules.
Simple really....