Thats an excellent question!!! One that really should only be answered by another Parent in that area in your situation. Real estate advice is really limited to property, location etc... I would do a google search and see if there are any parents groups for children with autism in that area. Talk to other Parents and site visit the schools. Each child is so different you really need to see if the fit is good for you. You'll know when you visit somewhere if it feels right or not. Trust your Parental intuition!
Best of Luck!!