Seems to me the school would need to try more services (certainly more than 30 minutes a week, for crying out loud!) and accommodations to meet the least restrictive environment requirement before going directly to a self-contained classroom.
If the neuropsychologist report is showing him so far behind that she's recommending self-contained, maybe another approach (assuming you want to keep him in the regular education setting) would be to argue the school failed at "child find" and now owe compensatory services - instead of putting him in a self-contained class due to their error.