Is there financial help if I adopt my special needs foster child?

I would like to adopt my foster child but I’m worried about the medical expenses. He is special needs and requires a lot of physical therapy and counseling. Right now, the state gives me a stipend through the Miami foster care program. The social worker on my case mentioned that Florida offers some post-adoption money for special needs kids, but she says that has to be negotiated and she can’t give me legal advice. Can a lawyer help me get some regular payments after an adoption so I can pay my son’s counseling and medical bills?