Theoretically yes, 30%, (don't forget about the interest payments) but the rules could be different from school to school. CBS is asking to show it funds just for the first year to issue I-20, not sure about the consular, but it could be reasonable to assume that he/she wants to see all money.
P.S. Don't you mix percentages? As far as i Know scholarships cover only tution not personal needs.
Thanks! Yes, scholarships only cover tuition but I am assuming the tuition amount is at least 50% of the student budget. So the scholarship in this case would be well within the tuition expense.
Also, extending your argument, lets say that the school offers me 30% scholarships and 70% school-based loans for the first year and second year. Wouldn't this theoretically mean that I have to show $0 as personal contribution? I know that that would not be advised, but do you get the point?