"Wow! Wouldn't that be around 1.5 bill per year just by taking 300K patients for Australia alone?"
Your arithmetic is good but keep in mind:
(1) $5K per year is my guess. I have no qualifications. (2) I doubt this would be covered by insurance or governmental assistance at this point in the process, so 300K users is probably high -- even though it would be a very good investment compared to current direct and indirect costs. (3) But I think you are starting to see the point of getting 2-73 approved in Australia and elsewhere. The revenue would be unbelievable.