How do you get a job growing medical marijuana?

When I get older, I want to grow medical marijuana for a living. NOT sell it. NOT smoke it, but sell it to the government for medicinal purposes. Even if I have to work in a green house for the government! I just want to know how much profit you make, and what you would have to do to get the job. Personal opinions on the so called "drug" isn't what I am asking for. If you can answer this question, then please do so. It would mean a lot to me!

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