The only real things that I forsee being an issue, are the yeast fermenting past 1.000 before you notice it, and the lemonade being too dry and not sweet enough. You could try a lower gravity to help control the alcohol level and sugar consumption, then backsweeten it after it's done fermenting and has undergone stabilization. Just a suggestion...I haven't ever fermented a hard lemonade, just mixed alcohol into lemonade
