With thousands of acres ripe for development, a new frontier of Hall County may open up with a massive sewer project that’s now under construction. Long-awaited sewer lines alongside Ga. 365 in northeastern Hall “will be a game changer when the (project) is completed and as things fill in,” said Brent Hoffman, a Realtor with Berkshire Hathaway in Gainesville. Ken Rearden, Hall’s public works and utilities director, had a captive audience when he spoke to commercial real estate brokers on the subject at a Greater Hall Chamber of Commerce meeting last week.