OFFGRID-INSTYLE homes are designed by David Macfarlane, whose formal qualifications include a Building Certificate (Sydney Tech.), BSc Architecture (UNSW), and MSc in Sustainable Building Design (Oxford Brookes).  Completed projects include one of Australia's first purpose-built off-grid resorts, now trading as Elysium Island Retreat, and a luxury off-grid Airbnb in northern Tasmania trading as Tamar Solarhome.  The goal is to develop a range of extremely energy-efficient home designs, with detailed construction drawings and materials order lists which can be purchased online so that they can be affordably built just about anywhere in the world by local tradesmen.