Forget selling to college students. They don't have any money and they already know how to get that stuff for free.

Sell to the colleges, themselves, go to the admissions offices, the athletic departments, the provosts, think big.

I don't know about tax preparers but I'd try to sell to regional H & R Block offices, say, rather than the individual practitioner down the street.

Your strategy seems to be to maximize your efforts in the service of minimizing your revenues.