[Welkin]

Very interesting website and concept. Most cities start out as small communities and then grow over the next 50-100 years as the local economy grows and develops. Building the buildings of a city of 1 million from scratch can be done if you have hundreds of billions in capital, but building a sustainable, multi-layer economy from scratch could pose a major problem. Unless you have a massive local employer, or natural resource like oil, that could employ 100,000 people quickly and build pretty much a company town (like Dubai); who is going to fill all your office buildings, where will all the service personnel come from, where do you get all the infrastructure (grocery stores, restaurants, gas stations...). Do you build everything then wait for it to fill up or do your first settlers have to wait until things are built? Even the world's biggest cities started out as small villages and grew infrastructure as the village grew. I don't think you can build a mega city from scratch on the north coast of Australia and expect it to work, but you could build a nice little city over the next 20-30 years. Rome was not built in a day.