I partly disagree on leaving energy performance until later. Even without a formal rating, information on cooling, heating, hot-water equipment and any obvious insulation issues can affect likely running costs. That said, Haruto's question about what “duplex” means is the first thing that needs...
Include the mobile handoff in that map. A workflow can look seamless at a desk yet fail when someone at a property cannot see the latest document or add context without opening several systems. I’d test one complete case using ordinary permissions, record where the audit trail breaks, and...