Tuition is expensive for everybody. If he came to the United States as a foreign student, he would also need to pay out of state tuition.
There are wealthy African families who have sufficient resources to pay tuition at any school in the country, up to and including elite schools here or in France and United Kingdom.
Other foreign students from developing countries, however, need to borrow the money. On some occasions, the money is provided by organized groups with the expectation that the money be re-paid (plus interest) when work is found in the US.
I doubt the interest rate demanded by these groups is the 1% currently offered by banks. Likewise, re-payment can involve money, future work obligations, or providing other forms of assistance to the group when "asked".
These groups can not only get extremely violent, but are also known to make increased demands on people that were not in the original agreement. Though most of the violence is directed against those being smuggled in the US and held at "drop houses", it may also extend to white collar student borrowers.