Keith and Margaret Platt have gotten to meet people from all over the world, including China, Ireland, Poland, Africa and Canada — all without leaving their Oakwood home.The Platts rent out a terrace-level apartment at their home on Lake Lanier as a vacation rental, and now that all homes in the county can be short-term rentals if homeowners get a business license, Hall County could be seeing more people like them become hosts for sites like VRBO and Airbnb.