K.L.
My daughter is 12 and I started her orthodontia when she was 11. She has a cross bite, too (hers wasn't so obvious) and she's had to go through the palate expander along with her braces. The first orthodontist we went to told me the same thing, that we should have started when she was younger, and then wanted to charge us ridiculous fees. I got a second opinion and she's getting exactly what she needs for a reasonable rate. I'd definitely seek another opinion.