Just to clarify, the loan is interest free ( 0.0%) It is more akin to an pay advance to pay for cadet start up costs, ie. laptop, uniforms etc.
Any expenses in the Senior (1/c) year will have to be paid by the cadet and will not be rolled into the loan (as it is generally paid back in full by then). For example, the saber and belt and I think dinner whites are bought senior year by the cadet, usually with their credit card through the post exchange.
So do budget for some 1/c expenses, after the loan is paid off.