There were plenty of seasoned folks [1] in our YC batch, our group included. 3 of 4 of our founders had families and real responsibilities. One major advantage to YC is it opens doors and connections. Many (most?) YC companies have more funding within 4 months than the ~$100k they get at the beginning.

[1] http://www.forbes.com/sites/parmyolson/2013/08/20/latest-bat...