Pursue FoxG testing?

Andy's geneticist did not want to test Andy for FOXG syndrome. He felt the symptoms were all too general and that anyone could fit the symptoms. I disagree, and am not sure about how to further pursue testing. His neuro is saying Andy needs whole exome testing, but we are not going to pay 10 thousand dollars for this. I've looked online for a kit we could use ourselves for the fox testing, but can't find one. I might have Andy return to a past neuro and ask his opinion on further testing. Fox g was a test I felt would be worthwhile, but when professionals don't agree, I don't know what to do.