Hi Tilstra,
Yes, you can purchase the digital download version from anywhere in the world. Digital download time estimates are based on your initial network speed and real install times may vary significantly, so it is not really possible to say how long it will take you. Our recommendation is that you install a small portion of scenery first, perhaps 6-10 tiles that would cover the area where you live or fly the most often. You can always add more scenery later.