Check with the Charlotte Housing Authority. They used to be a clearinghouse for places such as what you describe...they may still be for all I know!
Also, many of the newer apartment communities have a small percentage of their apartments outfitted for handicapped residents. Some, such as the David Dryer* owned ones will adjust the rent according to the income of the resident. **this was true before he died. Not sure if it still is.
hope that this is a start...Good Luck!