Professional Real Estate Services
Why A Large 55 Plus Community
The best answer to that is taken from an article by Eli Segall in the Las Vegas Sun, May 20, 2016 titled "Senior Surge – Age qualified development making comeback."  I intersperse my comments with quotes from the article.

"Whether you call them active-adult, age-qualified, age-restricted or age privileged, senior housing developments are making a comeback in Las Vegas."

I reply: All the present such developments currently under construction, planned, or presently talked about are small – about 450-500 homes total.  All of them together total less than the 7,000 plus units in either Sun City Anthem or Sun City Summerlin. 

Segall offers an explanation by quoting Home Builders Research founder Dennis Smith:
"But, by gobbling up land, communal amenities can make a project less lucrative for developers by slashing the number of home sites.  Amid the valley's rising land prices, perhaps it is no surprise, then, that none of the new projects underway include a golf course."

Segall then says:
"In years past, however, golf course communities for retirees were the norm.  Sun City Summerlin, which started taking shape about 25 years ago, led the way for Las Vegas' massive senior developments.  It boasts around 7,800 homes, three 18-hole golf courses, 14 tennis courts, eight bocce courts, card rooms social halls and a 312-seat theater."

This makes clear why the buyers are being offered by developers and builder only "skinnied down" versions of Sun City Anthem and Sun City Summerlin. Buyers in the new communities are offered only one small community center, typically one indoor and outdoor pool, and a few athletic courts – a fraction of what is offered in the existing SCA and SCS communities. PLUS, the new houses cost  more per square foot than the existing houses in SCA and SCM, where astute buyers are purchasing - at each community 15-20 existing homes PER WEEK.
You get more amenities and more house (and usually bigger lot) all for less cost.
Let me help you find one.  The seller pays the commission.