Will Medicaid cover in home care in NC? He has vascular dementia.

Each State runs their own program. You need to call your County Social Service office abd talk to a Medicaid caseworker. The in home program is based on income.

Because Medicaid is a joint program of both Federal and State the programs available to you will vary. I would start by calling Medicaid for your state directly and asking for a counselor to speak with you about needs and then try your local council on aging to see if there are any area programs to help you.
As you can imagine, those of us on the Forum being mostly caregivers ourselves in all different states and not a few countries, what's available in our individual areas has to be on us to research; it's no small task. I wish you good luck.