The LLC is 20% of tuition. If you're in the 12% (or less) tax bracket, you ostensibly come out ahead. Unfortunately taxes aren't that simple. Adding income could, for example, make you eligible for less Earned Income Credit. The only way to be sure, is prepare taxes both ways and compare.
This tool may be helpful: https://turbotax.intuit.com/tax-tools/calculators/taxcaster/?s=1
