This is an excellent post and should get some love. 60% of small businesses don't have a web presence at all and 90% have only ONE of website, FB, and Yelp. Offering to handle all of this stuff and then wrapping in Proofer/AdviceLocal/Yext and twice-monthly blogging is a nice business to be in. PRetty common to get $3-5k site builds and $500-1000 a month to manage and maintain the other stuff.