Can't comment on the school neighborhoods.
As far as retirement areas, Wake Forest has plenty of retirees. (It's the main source of new members for the
Raleigh Newcomers Club).
Reading the description you have of your mother, I can't help but think they should consider Carolina Preserves or (better location, IMO) Carolina Arbors. Both are Del Webb communities, 55+ with the usual clubhouse, pools, clubs, entertainment, landscaping included, etc. Neither have a golf course.
CP is completed, so they would be looking at resales. CA just opened last year and are selling a lot of homes, many different sizes, floor plans and price points.
There are a few other retirement, 55+ areas, Fearington Village (Pittsboro), Chapel Wood (Chapel Hill), and a few others. Where we live, Regency in Brier Creek Country Club, is not age restricted but was marketed to seniors, hence heavily populated with ages 50+, at least half of whom are retired. One spec left, and one resale currently on the market. We totally love it here.