You missed a third way which I think is actually most likely, given recent monetary stimulus policies: 3. You invest $500 in each student using prerecorded vid

You missed a third way which I think is actually most likely, given recent monetary stimulus policies: 3. You invest $500 in each student using prerecorded video classes and assignments graded by unpaid 'mentors', take on far more students, then structure groups of ISAs together into ISA-backed bonds, which you then sell to pension funds and other institutional investors for 15% off par value, or $25.5k each. Not only do you get paid up front, but whether or not the ISAs eventually get paid back is no longer your problem. Also now instead of recruiting and vetting 200 teachers to teach your 2000 students, you recruit 10 teachers and a couple experienced sell-side traders and analysts.