Yes, kids with an autism dx are eligible for state-funded services in SC. From what I've heard in the waiting room of the therapy center, your children can get Medicaid to cover their therapies regardless of the family's financial need - although that is easier or harder depending on the case worker you end up with. Apply at a Social Security office for this.
Additionally, the school dustricts provide services to preschool-aged kids with autism dxes. Here is the contact page for Greenville County: http://www.greenville.k12.sc.us/gcsd...sped/index.asp
and I'm sure that if your clients call they can get ciontact info for SpedEd offices in other counties if they can't find it online.
Where I live, and I suspect throughout the state, there are are both nice facilities and scary-as-hell facilities located next to courthouses, loan sharks and gun stores (no exaggeration). We use the facility in downtown Greenville: http://www.cdservices.org/
People drive long distances to use this facility.
In Greenville County, free public 4K is provided for kids with a range of identified special needs. The starting point for this is a Child Find screening. This program may or may not be a good fit - it will vary from class to class. In this county at least, the free 4K is also used as an EI service for kids with no organic disorder who are at-risk because they are being neglected.
I don't know how it works in other counties.