I feel your pain! I also have a daughter with autism, and you have so much to adapt to, the verbal aspect is all the more challenging. Mine is now doing amazingly well, on track to attend one of NYC's top schools for middle school. It took a lot of luck and a lot of help. Feel free to PM me, if you ever have the need.

Do you have insurance on the cello, or homeowner's insurance?  Meanwhile, here is a pic of my cello's crack