In digging around for other stuff I've come upon Anime Studio and Toon Boom for making animations. I know you can at least get a free trial of both of those. I'm not sure how good they are but it's worth a try. About 5 or 6 years ago a game came out called The Movies for pc, and it was a game, sorta reminiscent of the Sims 2, but you could make your 'movies' into longform effective cartoons. It was neat and I played the hell out of it. it's old and obsolete but still pretty fun.
Let the Music be your master, will you heed the Master's call?