What is the rent-vs-buy breakeven on Summerville or Sullivan's Island?

The rent-vs-buy breakeven on Summerville or Sullivan's Island depends on the specific home's price, the rent it's compared against, the mortgage rate, and how long the buyer stays, since these two towns sit at opposite ends of Brian's price range and won't share one answer. Sullivan's Island's higher price band generally pushes that breakeven further out than inland Summerville. Brian Beatty can run that math against a specific property in either town.