I know nothing about section 8 housing but you sound really excited about Charlotte so I will try to help. The Govt Office that u need 135 Scaleybark Rd, Charlotte, NC 28209
(704) 336-5184. Maybe they can help you.
Charlotte has 2 major hospital systems, Carolinas Medical Center
Carolinas Medical Center and Presbyterian
Health Information on Gastric Bypass, Women's Health, Heart Disease and more . The main hospitals are in the center of the city but each system has numerous hospitals in the outskirts of town. There is also a hospital system in Gastonia (approx 30 min west), I cant remember the name at the moment, and one in Rock Hill, SC (approx 30 min south) called Piedmont Healthcare
Iredell County NC Health Care, Mooresville Medical Care, Statesville Doctors, Troutman Physicians | Piedmont HealthCare . Both areas are still considered (to most) part of the Charlotte Area. I am sure I am missing some.
School systems, there is quite a bit of info on them on this website once you get housing and employment taken care of. I will say that Charlotte/Meck Schools have a lot of comments. They have gone through quite a bit in the past couple years. I think you will find all the area schools have their ups and downs.
Hope this info helps! Hope you and your family love Charlotte!