If she could be offered a subsidized loan, it would be a max of $3500 the first year, $4500 the second, and $5500 each of the last two. The amount you would save in interest would be the rate of interest (~4.5%) x $3500x 4 years, and then add the next amount for the next year, etc. It is definitely a savings if you can get it.
If the LLC wasn’t part of the calculation, would your EFC be substantially lower? If so, what you might ask for is reconsideration for other aid. There might be a departmental scholarsip or something the FA office can tell you about.